Home Page World War II Armed Forces — Orders of Battle and Organizations Last Updated 25.11.2014
Imperial Japanese Navy
Converted Minesweepers
In cooperation with Jeff Donahoo
The format for names is Japanese style: rank; last name, first name; Japanese name in Kaji;
(and in brackets the officer's graduating class of the Naval Academy at Etajima, if applicable).
(M) Behind the name indicates a merchant marine (civilian) officer.
Rank as was at the date he took command, whether as supervisor or captain.
If an officer is shown as being in command before the ship was commissioned, he was Chief Equipping Officer, becoming Commanding Officer on the date the ship was commissioned.
Dates are given thus: day.month.year
Commanders marked with * are known to have died.
Aioi Maru    相生丸    イオイア  
   Builder: Goshi Kaisha Urabe Zosen Tekkosho
   Owner: Showa Kogyo  
   Call Sign: JGHJ  
   Official Number: 40697  
   Laid Down: 01.01.1935
   Launched: 17.04.1935
   Completed (358 GRT): 01.05.1935
   Requisitioned: 20.12.1941
   Service:  
      AM Div 34, Kure ND 20.12.41–
      AM Div 34 –09.45
   Fate: Surrendered  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt(jg) Kawamura Masaru河村 勝20.12.41–05.11.44
      Lt Matsuda Akira松田 昭05.11.44–
Asahi Maru No. 2 Go    第二號朝日丸    ハサア  
   Builder: Goshi Kaisha Urabe Zosen Tekkosho
   Owner: Asahigami Kaisoten  
   Call Sign: JWII  
   Official Number: 39686  
   Laid Down: 01.05.1934
   Launched: 11.08.1934
   Completed (283 GRT): 01.09.1934
   Requisitioned: 20.09.1941
   Service:  
      ? ?
      AM Div 33, Kure ND 01.12.1941
      ? ?
      AM Div 33, 7th Fleet 10.04.45–01.06.45
   Fate: ?  
   Removed from Navy List: 01.12.1945
   Commanding Officers:  
      Resv Lt(jg) Kumabe Itsuo隈部五夫20.09.41–20.12.43
      Resv Lt Iizuka Hitoshi飯塚 均20.12.44–
Ataka Maru    安宅丸    カタア  
   Builder: Kobe Seikosho Toba Zosensho
   Owner: Nippon Suisan  
   Call Sign: JNHA  
   Official Number: 28223  
   Laid Down: ?
   Launched: 01.12.1921
   Completed (275 GRT)  
   Requisitioned: 06.11.1937
   Service:  
      Returned to owner 19.11.1938
      Requisitioned: 16.12.1940
      ? ?
   Fate: Sunk 27.07.44  
   Removed from Navy List:  
   Commanding Officers:  
      Resv Lt(jg) Maeji Takeichi前地武一13.11.37–
      Resv Lt(jg) Sato Shozo 16佐藤正三12.40–27.07.44
Atsu Maru    阿津丸  
   Builder: Endo Tekkosho
   Owner: Awakoko Kyodo Kisen  
   Call Sign: JFAH  
   Official Number: 39749  
   Laid Down: 01.08.1934
   Launched: 01.10.1934
   Completed (160 GRT): 20.12.1934
   Requisitioned: 15.08.1942
   Service:  
      AM Div 32, Osaka Guard District 15.08.42–
      ? ?
      AM Div 32 –01.10.44
      ? ?
   Fate: Surrendered, sunk 1962  
   Removed from Navy List: 01.12.1945
   Commanding Officers:  
      Resv Lt Nihei Jinsaku仁平仁作15.08.42–09.10.43
      Resv Lt Ninomiya Jinsaku二宮仁作09.10.44–10.24.44
      Resv Lt Yamashita Toshitaka山下俊孝24.10.44–
Banshu Maru No. 18    第十八播州丸  
   Builder: Mitsubishi Zosen Hikoshima Zosensho
   Owner: Hayashikane Shoten  
   Call Sign: JRQE  
   Official Number: 28285  
   Laid Down: 21.04.1922
   Launched: 20.06.1922
   Completed (264 GRT): 24.07.1922
   Requisitioned: 01.12.1941
   Service:  
      AM Div 26, Yokosuka ND 12.41–
      ? ?
      AM Div 26 –31.07.45
   Fate: Sunk 28.07.45 by US aircraft off Owase (34°04'N, 136°15'E).  
   Removed from Navy List: ?
   Commanding Officers:  
    Resv Lt(jg) Shuko Masaru秋光 勝01.12.41–15.08.43
    Resv Lt Yasunaga Fumitomo安永文友15.08.43–30.09.44
    Resv Lt Takeshita Toyokazu竹下豊一30.09.44–01.05.45
    Resv Lt Kumagaya Michio熊谷 三千雄01.05.45–28.07.45
Banshu Maru No. 51    第五十一播州丸  
   Builder: Mitsubishi Zosen Kobe Zosensho
   Owner: Hayashikane Shoten  
   Call Sign: JBUA  
   Official Number: 28261  
   Laid Down: 01.09.1921
   Launched: 24.11.1921
   Completed (234 GRT): 15.12.1921
   Requisitioned: 15.10.1940
   Service:  
      ? ?
      AM Div 35, Maizuru ND 12.41–
      ? ?
      AM Div 35 –30.06.45
      Merchant  30.07.45-9.45
   Removed from Navy List: ?
   Commanding Officers:  
      Resv Lt(jg) Okubo Heihachi大久保平八郎15.01.41–01.07.41
      Resv Lt(jg) Hosokawa Tetsuo細川鐡雄01.07.41–22.12.43
      Resv Lt Tanaka Nubuo田中房男22.12.43–
Banshu Maru No. 52    第五十二播州丸  
   Builder: Mitsubishi Zosen Kobe Zosensho
   Owner: Hayashikane Shoten  
   Call Sign: JDKA  
   Official Number: 28262  
   Laid Down: 04.09.1921
   Launched: 05.11.1921
   Completed (234 GRT): 28.11.1921
   Requisitioned: 15.10.1940
   Service:  
      ? ?
      Returned: 10.06.1941
      Requisitioned: 01.12.1941
      AM Div 46, Bako Guard District 12.41–31.05.42
      Bako Guard District 31.05.42–
    Fate: Sunk 20.01.42 by mine in Subic Bay, Luzon (14°45'N, 120°17'E).  
    Removed from Navy List: 05.02.1942
   Commanding Officers:  
      Resv Lt(jg) Kubo Tadahiko久保忠彦15.01.41–01.12.41
      Resv Lt(jg) Uchida Shoji内田正二01.12.41–20.01.42
Banshu Maru No. 56    第五十六播州丸  
   Builder: Teikoku Kisen Toba Zosensho
   Owner: Hayashikane Shoten  
   Call Sign: JOAA  
   Official Number: 27655  
   Laid Down:  
   Launched: 01.12.1936
   Completed (267 GRT)  
    Requisitioned: 01.12.1941
   Service:  
      AM Div 46, Bako Guard District 12.41–31.05.42
      Bako Guard District 31.05.42–
      ? ?
    Fate: Sunk 11.01.45 in Manila Bay  
    Removed from Navy List: 25.01.1945
   Commanding Officers:  
      Resv Lt(jg)Ueno Okura上野大藏01.12.41–
      Mid Haga Kura芳賀 庫10.09.44–11.01.45
Bisan Maru    眉山丸  
   Builder: Sanoyasu Dock
   Owner: Setsuyo Shosen  
   Call Sign: JRUE  
   Official Number: 28721  
   Laid Down:  
   Launched: 22.10.1922
   Completed (344 GRT)  
    Requisitioned: 20.09.1941
   Service:  
      ? ?
      AM Div 33, Kure ND 12.41–
      ? ?
      AM Div 33, 7th Fleet 10.04.45–01.06.45
      ? ?
    Fate: Surrendered  
   Removed from Navy List: 01.12.1945
   Commanding Officers:  
    Resv Lt(jg)Terasaki Teruo寺崎輝男20.09.41–01.10.42
    Resv Lt(jg)Nishimura Tsunao西村綱夫01.10.42–15.12.44
    Resv Lt Sakamaki Hitoshi         坂牧平一15.12.44–20.12.44
    Resv Lt Koga Shunji古賀春次20.12.44–
Chikushi Maru    筑紫丸  
   Builder: Osaka Tekkosho Innoshima Kojo
   Owner: Nippon Suisan  
   Call Sign: JCJA  
   Official Number: 27136  
   Laid Down:  
   Launched: 01.08.1920
   Completed (220 GRT): 01.08.1920
   Requisitioned: 16.12.1940
   Service:  
      ? ?
   Fate: Sunk 04.11.43  
   Removed from Navy List: 01.12.1943
   Commanding Officers:  
      Resv Lt(jg) [?]田口 昻16.12.40–
Chitose Maru    ちとせ丸    セトチ
   Builder: Nakata Zosensho
   Owner: Matsu Kato  
   Call Sign: JTCL  
   Official Number: 42946  
   Laid Down: 01.12.1936
   Launched: 02.03.1937
   Completed (245 GRT): 01.04.1937
    Requisitioned: 20.12.1941
   Service:  
      AM Div 43 12.41–10.05.45
    Fate: Sunk 24.03.45 by US aircraft off Amami-Oshima (29°12'N, 126°13'E).  
   Removed from Navy List: 10.05.1945
   Commanding Officers:  
      Resv Lt(jg) Okimura Shizuo沖村静雄20.12.41–
      Resv Lt Kiyomasa Keishi清正慶志25.10.43–
Choun Maru No. 6    第六長運丸  
   Builder: Mitsubishi Zosen Nagasaki Zosensho
   Owner: Nagasaki Godo Unso  
   Call Sign: JUKF  
   Official Number: 37525  
   Laid Down: 01.02.1932
   Launched: 20.04.1932
   Completed (167 GRT): 03.05.1932
   Requisitioned: 25.07.1941
   Service:  
      ? ?
      AM Div 44 12.41–20.05.42
      AM Div 44, 9th Base Force, 1st Southern Exp, SW Area 20.05.42–20.11.43
      AM Div 44, 10th Base Force, 1st South Exp, SW Area 20.11.43–05.02.45
      AM Div 44, 10th Base Force, 1st South Exp Fleet, 10th Area 05.02.45–09.45
   Fate: ?  
   Removed from Navy List: 10.08.1945
   Commanding Officers:  
    Resv Lt(jg) Fukuda Moichiro福田茂一郎05.07.41–
    Resv Lt(jg) Narita Akio成田秋男30.01.43–15.12.44
    Resv Lt Kikiuchi Masaharu垣内正治15.12.44–20.04.45
    Resv Lt Yamazaki Itsumi山崎五三20.04.45–
Choun Maru No. 7    第七長運丸  
   Builder: Mitsubishi Jukogyo Hikoshima Zosensho
   Owner: Nagasaki Godo Unso  
   Call Sign: JBWI  
   Official Number: 38672  
   Laid Down: 26.02.1934
   Launched: 22.05.1934
   Completed (163 GRT): 05.07.1934
   Requisitioned: 25.07.1941
   Service:  
      ? ?
      AM Div 44 12.41–20.05.42
      AM Div 44, 9th Base Force, 1st South Exp, SW Area 20.05.42–20.11.43
      AM Div 44, 10th Base Force, 1st South Exp, SW Area 20.11.43–05.02.45
      ? ?
   Fate: Sunk by unknown causes 14.12.44  
   Removed from Navy List: 10.08.1945
   Commanding Officers:  
      Resv Lt(jg) Natsumura Takeo松村武雄25.07.41–10.02.44
      Resv Lt Takano Gunji高野軍司10.02.44–15.03.44
      Resv Lt Koga Kenjiro古家乾二郎15.03.44–14.12.44
Choun Maru No. 8    第八長運丸  
   Builder: Mitsubishi Zosen Nagasaki Zosensho
   Owner: Nagasaki Godo Unso  
   Call Sign: JUOF  
   Official Number: 38028  
   Laid Down: 25.01.1933
   Launched: 12.04.1933
   Completed (167 GRT): 30.04.1933
   Requisitioned: 10.12.1941
   Service:  
      AM Div 43 12.41–10.01.45
   Fate: ?  
   Removed from Navy List: 10.01.1945
   Commanding Officers:  
      Resv Lt(jg) Uetaka Kazuo上高一雄10.12.41–29.09.42
      Resv Lt(jg) Wajima Sadao倭島定雄29.09.42–20.02.45
      Resv Lt Nakamura Keijiro中村恵二郎20.02.45–
Choun Maru No. 18    第十八長運丸  
   Builder: Mitsubishi Jukogyo Hikoshima Zosensho
   Owner: Nagasaki Godo Unsa  
   Call Sign: JCPI  
   Official Number: 401082  
   Laid Down: 14.03.1935
   Launched: 02.07.1935
   Completed (195 GRT): 09.08.1935
   Requisitioned: 10.12.1941
   Service:  
      AM Div 46, Bako Guard District 12.41–31.05.42
      Bako Guard District 31.05.42–
      ? ?
   Fate: Sunk 12.09.44 by US aircraft off Cebu (10.20'N, 124°00'E).
   Removed from Navy List: 10.05.1945
   Commanding Officers:  
      Resv Lt(jg) Fujii Jiro藤井二郎10.12.41–
Choun Maru No. 21    第二十日之出丸  
   Builder: Mitsubishi Jukogyo Hikoshima Zosensho
   Owner: Nagasaki Godo Unso  
   Call Sign: JCQI  
   Official Number: 40089  
   Laid Down: 14.03.1935
   Launched: 18.07.1935
   Completed (195 GRT): 29.08.1935
   Requisitioned: 10.12.1941
   Service:  
      AM Div 46, Bako Guard District 12.41–05.02.42
      Bako Guard District 31.05.42–
      ? ?
   Fate: Sunk 25.11.44 in Manila Bay  
   Removed from Navy List: 10.05.1945
   Commanding Officers:  
      Resv Lt(jg) Kita Choujin北 朝人04.12.41–
      Resv Lt Kikuchi Fusaji菊池 房治25.05.44–25.11.44
Choyo Maru    朝洋丸  
   Builder: [Yatsushiro, Kumamoto ?]
   Owner: Hayashikawa Shoten  
   Call Sign: JMLR  
   Official Number: 44169  
   Laid Down:  
   Launched: 01.10.1937
   Completed (80 GRT)  
   Requisitioned: 16.12.1940
   Service:  
      ? ?
      AM Div 27, Ominato Guard District 12.41–15.03.42
      ? ?
   Fate: Sunk 14.07.45  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt(jg) Imai Tetsuo今井哲夫15.12.40–01.06.42
      Spec Duty Ens Kato Kumanosuke加藤熊之助01.06.42–01.08.42
      Spec Duty Ens Arai Shinpei新井眞平01.08.42–01.10.42
      Spec Duty Mid Kato Kumanosuke加藤熊之助01.10.42–30.06.43
      CWO Kriahara Jinsuke栗原甚介30.06.43–08.43
      Resv Lt(jg) Takahashi Ginji高橋銀二08.43–02.44
      Resv Lt Inoue Hideya井上英也02.44–07.44
      Mid Takeda Chouji武田長治07.44–19.08.44
      CWO.Mid Suiseki Tadashi水石 正19.08.44–
Choyo Maru No. 2    第二朝洋丸  
   Builder: [Yatsushiro, Kumamoto ?]
   Owner: Hayashikane Shoten  
   Call Sign: JASM  
   Official Number: 44170  
   Laid Down:  
   Launched: 01.10.1937
   Completed (80 GRT)  
   Requisitioned: 16.12.1940
   Service:  
      ? ?
      AM Div 27, Ominato Guard District 12.41–15.03.42
      ? ?
   Fate: Sunk 14.07.45 by US aircraft 5 nm off Kikonai (41°38'N, 140°35'E).  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt(jg) Hashimura Naoharu橋村直春16.12.40–01.06.42
      Spec Duty Mid Arai Shinpei新井眞平 CK01.06.42–30.06.43
      Spec Duty Lt(jg) Uchiyama Hitotaka内山廣隆30.06.43–09.43
      CWO Kuribayashi Takeshi栗林 健09.43–30.09.43
      Spec Duty Lt(jg) Arai Shinpei新井眞平30.09.43–10.43
      CWO Hayashi Kunimi林 邦美10.43–02.44
      CWO Watanabe Tetsuo渡邊哲夫02.44–06.45
      Mid Koide Yukio小出行夫06.45–14.07.45
Eguchi Maru No. 3    第三江口丸  
   Builder: Kanauchi Zosensho
   Owner: Eguchi Kisen  
   Call Sign: JXIJ  
   Official Number: 39846  
   Laid Down: 18.08.1934
   Launched: 30.10.1934
   Completed (GRT198 ): 26.01.1935
   Service:  
   Requisitioned: 12.09.1941
      ? ?
      AM Div 32, Osaka Guard District 12.41–
      AM Div 32 –01.10.44
      ? ?
   Fate: Sunk 06.09.44 by USS Shad (SS-235) off Kii Suido (33°27'N, 135°33'E).  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt(jg) Funaki Kiyoto船木清登12.09.41–
Fuji Maru    藤丸  
   Builder: Goshi Kaisha Kanasashi Zosensho
   Owner: Tokyowan Kisen  
   Call Sign: JESI  
   Official Number: 34543  
   Laid Down:  
   Launched: 01.06.1929
   Completed (GRT230 ): 18.08.1929
   Requisitioned: 20.12.1941
   Service:  
      AM Div 28, Ominato Guard District 12.41–
      AM Div 28 –05.08.45
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt(jg) Ujihara Shigeru氏原 茂20.02.41–
      Resv Lt Otatsume Hiroshi大立目 博15.04.44–
Fukuei Maru No. 7    第七福榮丸  
   Builder: Mihara Zosen Tekkosho
   Owner: Mansen Unyu  
   Call Sign: JFKJ  
   Official Number: 40027  
   Laid Down: 01.09.1934
   Launched: 25.12.1934
   Completed (GRT): 01.01.1935
   Requisitioned: 20.12.1941
   Service:  
      AM Div 28, Ominato Guard District 12.41–
      AM Div 28 –05.08.45
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 01.12.1945
   Commanding Officers:  
      Resv Lt(jg) Toyama Haruyoshi外山晴祥20.12.41–
      Resv Lt Okazaki Yoshiro岡崎義郎25.12.44–
Fumi Maru No. 2    第二文丸  
   Builder: Moss Værft & Dokk, Jeløya, Moss, Norway
   Owner: Taiyo Hogei  
   Call Sign: JWDN  
   Official Number: 47280  
   Laid Down:  
   Launched: 01.09.1939
   Completed (GRT): 02.12.1939
   Requisitioned: 01.09.1943
   Service:  
      ? ?
   Fate: Sunk 21.09.44 by USS Shad (SS-235) 18 nm E of Nii Jima (34°45'N, 139°40'E).
   Removed from Navy List: 10.11.1944
   Commanding Officers:  
      Resv Lt(jg) Nagata Mamoru永田 守12.09.41–01.03.44
      Resv Lt Ikeda Yujiro池田雄次郎01.03.44–21.09.44
Hagoromo Maru    羽衣丸  
   Builder: Tokyo Ishikawajima Zosensho
   Owner: Nippon Suisan  
   Call Sign: JNGA  
   Official Number: 27692  
   Laid Down:  
   Launched: 15.06.1920
   CompletedCompleted (234 GRT)  
   Requisitioned: 16.12.1940
   Service:  
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt(jg) Okuda Shinichi奥田眞一16.12.40–28.07.41
      Resv Lt(jg) Hayakawa Kazuo早川和郎28.07.41–09.44
      Resv Lt Uenishi Tarou上西太郎09.44–
Hakata Maru No. 6    第六博多丸  
   Builder: Kobeseikosho Harima Zosen Kojo
   Owner: Nippon Suisen  
   Call Sign: JWLB  
   Official Number: 28561  
   Laid Down: 01.05.1922
   Launched: 10.08.1922
   Completed (GRT): 22.09.1922
   Requisitioned: 02.11.1937
   Returned: 08.12.1938
   Requisitioned: 16.12.1940
   Service:  
      AM Div 35, Maizuru ND 12.41–
      AM Div 35 –30.06.45
      ? ?
   Fate: Sunk 16.10.44 by US aircraft off Daito Island  
   Removed from Navy List: ?
   Commanding Officers:  
      Resv Lt(jg) Egashira Tomiya江頭富也13.11.37–08.12.38
      Resv Lt(jg) Yamada Tsunezo山田常三16.12.40–12.05.41
      Resv Lt(jg) Hosokawa Tetsuo細川鐡雄12.05.41–01.07.41
      Resv Lt(jg) Okubo Heihachi大久保平八郎01.07.41–25.06.43
      Resv Lt Kamano Nagayoshi釜野長義29.06.43–16.10.44
Hakata Maru No. 7    第七博多丸  
   Builder: Kobeseikosho Harima Zosen Kojo
   Owner: Nippon Suisen  
   Call Sign: JWMB  
   Official Number: 29632  
   Laid Down: 05.09.1923
   Launched: 16.10.1923
   Completed (257 GRT): 16.11.1923
   Requisitioned: 27.10.1937
   Service:  
      Returned 30.11.1938
      Requisitioned 01.12.1941
      AM Div 43 12.41–10.12.44
   Fate: Sunk 10.10.44  
   Removed from Navy List: 10.12.1944
   Commanding Officers:  
      Resv Lt(jg) Takamatsu高松彌四郎13.11.37–30.11.38
      Resv Lt(jg) Akashi Shiro明石四郎01.12.41–
Haraji Maru    原地丸  
   Builder: Dublin Dockyard, Dublin
   Owner:  
   Call Sign: JWHY  
   Official Number:  
   Laid Down:  
   Launched: 01.05.1927
   Completed (555 GRT)  
   Requisitioned: 20.12.1942
   Service:  
      ? ?
   Fate: Sunk 26.11.43  
   Removed from Navy List: 10.03.1944
   Commanding Officers:  
  ?
Himeshima Maru    姫島丸  
   Builder: Mitsubishi Zosen Nagasaki Zosensho
   Owner: Nippon Suisen  
   Call Sign: JXLB  
   Official Number: 32612  
   Laid Down: 21.06.1927
   Launched: 27.09.1927
   Completed (274 GRT): 31.10.1927
   Requisitioned: 01.12.1941
   Service:  
      AM Div 43 12.41–05.06.45
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 10.01.1946
   Commanding Officers:  
      Resv Lt(jg) Suzuki Masao鈴木正雄01.12.41–1942
      Resv Lt Yoshimura Yuki吉村 順–25.11.44
      Resv Lt Minami Shiro南 四郎25.11.44–
Hinode Maru No. 17    第十七日之出丸  
   Builder: Tokyo Ishikawajima Zosensho
   Owner: Hinode Gyogyo  
   Call Sign: JSNB  
   Official Number: 26440  
   Laid Down:  
   Launched: 01.12.1919
   Completed (274 GRT)  
   Requisitioned: 15.10.1940
   Service:  
      AM Div 49, Chinkai Guard District 12.41–
      AM Div 49 –10.07.45
   Fate: Sunk 11.04.45 by USS Spadefish (SS-411) off Tokchok-Kundo (37°13'N, 125°11'E).  
   Removed from Navy List: 10.07.1945
   Commanding Officers:  
      Resv Lt(jg) Takebayashii Nobuo竹林信夫05.01.41–25.05.44
      Resv Lt Maehara Izuru前原 出25.05.44–30.01.45
      Resv Lt Sakurai Motoaki櫻井素明30.01.45–11.04.45
Hinode Maru No. 18    第十八日之出丸  
   Builder: Tokyo Ishikawajima Zosensho
   Owner: Hinode Gyogyo  
   Call Sign: JUVB  
   Official Number: 26443  
   Laid Down:  
   Launched: 01.01.1920
   Completed (235 GRT)  
   Requisitioned: 05.10.1940
   Service:  
      ? ?
      AM Div 49, Chinkai Guard District 12.41–
      AM Div 49 –15.08.45
   Fate: Sunk 26.07.45 by US aircraft off Hazhyu-man, Korea (37°58'N, 126°40'E).  
   Removed from Navy List: 15.08.1945
   Commanding Officers:  
      Resv Lt(jg)Tezuka Kazue手塚一衛15.01.41–10.07.44
      Resv Lt Kato Masao加藤正男10.07.44–20.06.45
      Resv Lt Tanabe Katsusuke田邊勝典20.06.45–26.07.45
Hinode Maru No. 20    第二十日之出丸  
   Builder: Harima Zosensho
   Owner: Hinode Gyogyo  
   Call Sign: JFRC  
   Official Number: 36206  
   Laid Down: 15.02.1930
   Launched: 21.05.1930
   Completed (281 GRT): 31.07.1930
   Requisitioned: 04.12.1941
   Service:  
      AM Div 45, Bako Guard District 04.12.41–
      AM Div 45 –30.04.45
   Fate: Sunk 21.08.44 by USS Barb (SS-220) south of Taiwan (21°21'N, 121°11'E).  
   Removed from Navy List: 30.04.1945
   Commanding Officers:  
      Resv Lt(jg) Kita Choujin北 朝人 CK04.12.41–
      Resv Lt Kikuchi Fusaji菊池 房治 CK25.05.44–21.08.44
Hoei Maru    寳永丸  
   Builder: Osaka Tekkosho Innoshima Kojo
   Owner: Nippon Suisen  
   Call Sign: JDPA  
   Official Number: 26007  
   Laid Down:  
   Launched: 01.12.1919
   Completed (219 GRT): 01.12.1919
   Requisitioned: 01.12.1941
   Service:  
      AM Div 43 12.41–05.06.45
      ? ?
   Fate: Sunk 29.09.44 by USS Skate (SS-305) off Yoronjima (27°14'N, 128°29'E).  
   Removed from Navy List: 10.01.1945
   Commanding Officers:  
      Resv Lt(jg) Toyama Yasuo遠山靖雄01.12.41–
Kaiyo Maru No. 1    第一開洋丸  
   Builder: [Nagasaki ?]
   Owner: Yoji Yamada  
   Call Sign: JKZK  
   Official Number: 43510  
   Laid Down:  
   Launched: 01.08.1923
   Completed (93 GRT)  
   Builder:
   Owner: Yoji Yamada  
   Call Sign: JKZK  
   Official Number: 43510  
   Requisitioned: 16.12.1940
   Service:  
      AM Div 48, Chinkai Guard District 12.41–
      AM Div 48 –09.45
   Fate: Surrendered  
   Removed from Navy List: 01.06.1946
   Commanding Officers:  
      Resv Lt(jg) Abe Mutsuo阿部六郎15.10.41–05.02.43
      Resv Lt Nakao Yuzo中尾雄三05.02.43–01.02.45
      Resv Lt Sato Muneo佐藤 熟01.02.45–
Kaiyo Maru No. 3    第三開洋丸  
   Builder: [Nagasaki ?]
   Owner: Yuji Yamada  
   Call Sign: JIAL  
   Official Number: 43511  
   Laid Down:  
   Launched: 01.08.1923
   Completed (93 GRT)  
   Requisitioned: 16.12.1940
   Service:  
      ? ?
      AM Div 48, Chinkai Guard District 12.41–
      AM Div 48 –09.45
   Fate: Surrendered  
   Removed from Navy List: 01.06.1946
   Commanding Officers:  
      Resv Lt(jg) Uami Shinjiro宇佐美信二郎15.10.41–10.07.44
      Resv Lt Yumura Kentarou湯村 健太郎10.07.44–
Keijin Maru No. 1    第一京仁丸  
   Builder: Goshi Kaisha Urabe Zosen Tekkosho
   Owner: Keijin Shosen  
   Call Sign: JBVL  
   Official Number: C2291  
   Laid Down: 01.02.1937
   Launched: 01.07.1937
   Completed (433 GRT): 01.09.1937
   Requisitioned: 04.12.1941
   AM Div 26, Yokosuka ND 12.41–
   AM Div 26 –31.07.45
   Fate: Wrecked 28.07.45 off Owase  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt(jg) Kanno Noriyuki神野則之04.12.41–02.44
      Resv Lt Okamura Minoru岡村 豊02.44–01.06.44
      Resv Lt Tsuchiya Hiroshi土屋 博01.06.44–
Keijin Maru No. 2    第二京仁丸  
   Builder: Goshi Kaisha Urabe Zosen Tekkosho
   Owner: Keijin Shosen  
   Call Sign: JBWL  
   Official Number: C2292  
   Laid Down: 01.02.1937
   Launched: 19.08.1937
   Completed (433 GRT): 29.10.1937
   Requisitioned: 10.12.1941
   Service:  
      AM Div 26, Yokosuka ND 12.41–
      AM Div 26 –31.07.45
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt(jg) Kikuchi Soichiro菊池素一郎10.12.41–10.44
      Resv Lt Katsusawa Hiroshi唐澤廣志10.44–20.02.45
      Resv Lt Sakamaki Hitoshi坂牧平一20.02.45–07.45
      Resv Lt [?]境翌 實07.45–
Keijin Maru No. 3    第三京仁丸  
   Builder: Goshi Kaisha Urabe Zosen Tekkosho
   Owner: Keijin Shosen  
   Call Sign: JBYL  
   Official Number: C2296  
   Laid Down: 01.02.1937
   Launched: 01.09.1937
   Completed (433 GRT): 25.11.1937
   Requisitioned: 01.02.1942
   Service:  
      AM Div 28, Ominato Guard District 01.02.42–
      AM Div 28 –05.08.45
   Fate: Sunk 14.07.45 by US aircraft NE of Shiriya-saki (41°30N 141°30E).  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Lt Naito Goro内藤梧郎01.05.42–09.08.44
      Resv Lt Naoe Masaji直江政治05.08.44–
Keijin Maru No. 5    第五京仁丸  
   Builder: Goshi Kaisha Urabe Zosen Tekkosho
   Owner: Keijin Shosen  
   Call Sign: JBZL  
   Official Number: C2299  
   Laid Down: 01.02.1937
   Launched: 29.10.1937
   Completed (433 GRT): 23.12.1937
   Requisitioned: 10.12.1941
   Service:  
      AM Div 28, Ominato Guard District 12.41–
      AM Div 28 –05.08.45
      ? ?
   Fate: Surrendered.  
   Removed from Navy List: 01.12.1945
   Commanding Officers:  
      Resv Lt(jg)Yamamoto Soujiro山本宗次郎10.12.41–25.08.43
      Resv Lt Baba Kentaro馬場賢太郎25.08.43–01.02.45
      Resv Lt Takatsu Akira高津 彬01.02.45–
Keinan Maru    慶南丸  
   Builder: Kobeseikosho Harima Zosen Kojo
   Owner: Nippon Suisen  
   Call Sign: JWNB  
   Official Number: 33565  
   Laid Down: 25.01.1928
   Launched: 22.05.1928
   Completed (316 GRT): 03.08.1928
   Requisitioned: 12.09.1941
   Service:  
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 25.01.1945
   Commanding Officers:  
      Resv Lt(jg) Okazaki Hiroshi岡崎 寛12.09.41–25.05.44
      Resv Lt Sekiguchi Yoshitaka關口吉孝25.05.44–04.09.44
      Resv Lt Ouchi Masayuki大内正之04.09.44–
Kiri Maru No. 5    第五桐丸  
   Builder: Sanoyasu Dock
   Owner: Sanyo Nanyo Kisen  
   Call Sign: JTML  
   Official Number: 42962  
   Laid Down: 01.02.1937
   Launched: 15.04.1937
   Completed (335 GRT): 01.05.1937
   Requisitioned: 12.09.1941
   Service:  
      AM Div 33, Kure ND 01.12.1941
      AM Div 33, 7th Fleet 10.04.45–01.06.45
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 01.12.1945
   Commanding Officers:  
      Resv Lt Fujimori Saburo藤森三郎12.09.41–19.11.41
      Resv Lt Kuwajima [?]桑島 包之助19.11.41–
      Resv Lt Yamada Kunio山田圀雄25.05.44–20.02.45
      Resv Lt Yamazaki Kyou山崎 恭20.02.45–
Koho Maru No. 1 Go    第一號黄浦丸  
   Builder: Shanghai Dock & Engineering Co, Shanghai
   Call Sign: JLAR  
   Official Number:  
   Laid Down:  
   Launched: 20.03.1905
   Completed as for Norddeutscher Lloyd as S/S Bremen (274 GRT)1906
   Service:  
      Seized at Shanghai by Chinese Government as Li Fung: 14.03.17
      Shanghai Tug & Lighter Co Ltd, Shanghai (British flag) as Scot I 1924
      Seized by the Japanese at Shanghai, renamed Koho Maru No. 108.12.41
      Requisitioned: 30.06.42
      ? ?
   Fate: Surrendered. Reportedly handed back to British late 1945.   
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Mid Harada [?]原田経秋01.04.45–
Koho Maru No. 2 Go    第二號黄浦丸  
   Builder: Osaka Iron Works, Osaka, Japan
   Call Sign: JLBR  
   Official Number: ?  
   Laid Down:  
   Launched: 18.03.1905
   Completed for Atlantic, Gulf and Pacific Coast Co, Manila as Robert K (252 GRT)
1904
   Service: 
      Insular Lumber Co, Manila as W P Clark 1912
      Visayan Stevedoring Co, Iloilo as Salvador1923
      Renamed Salvador II1932
      Mollers' Towages Ltd, Shanghai (British flag) as as Diana Moller1935
      Seized by the Japanese at Shanghai, renamed Koho Maru No. 208.12.1941
      Requisitioned: 30.06.1942
      ? ?
   Fate: Sunk 11.04.45  
   Removed from Navy List: ?
   Commanding Officers:  
      CWO Nagakura Kumitake長倉国高01.08.44–15.03.45
      Mid Miyagawa Nobuaki宮川暢昭20.03.45–11.04.45
Kongo Maru No. 2 Go    第二號金剛丸  
   Builder: Osaka Tekkosho Innoshima Kojo
   Owner: Nippon Suisen  
   Call Sign: JIXA  
   Official Number: 28732  
   Laid Down:  
   Launched: 05.12.1922
   Completed (216 GRT): 01.12.1922
   Requisitioned: 05.10.1940
   Service:  
      ? ?
      AM Div 25 12.41–01.11.43
      ? ?
   Fate: Sunk 10.08.45 by US aircraft off Onagawa (38°30'N, 141°29'E).  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt      05.1.40小島琇一 
      Resv Lt(jg) Tazaki Sueo田崎季夫16.12.40–02.02.42
      Resv Lt(jg) Takeshita Yoshimasa竹下義政02.02.42–01.04.44
      Resv Lt Maruo Takushi丸尾卓志01.04.44–
Kozan Maru    甲山丸  
   Builder: Goshi Kaisha Urabe Zosen Tekkosho
   Owner: Kobe Sambashi  
   Call Sign: JWAI  
   Official Number: 39211  
   Laid Down: 01.03.1934
   Launched: 01.05.1934
   Completed (277 GRT): 01.07.1934
   Requisitioned: 20.12.1941
   Service:  
      AM Div 34, Kure ND 20.12.41–
      AM Div 34 –09.45
   Fate: Surrendered  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt(jg) Matsui Kounosuke松井 孝之助20.12.41–15.12.44
      Resv Lt Nakano Hajime中野龜一15.12.44–
Kyo Maru No. 1    第一京丸  
   Builder: Tsurumi Seitetsu Zosen
   Owner: Kyokuyo Hogei  
   Call Sign: JDDM  
   Official Number: 44389  
   Laid Down: 06.10.1937
   Launched: 21.12.1937
   Completed (340 GRT): 09.02.1938
   Requisitioned: 10.11.1941
   Service:  
      AM Div 41, Sasebo ND 12.41–15.02.42
      AM Div 41, 12th Base Force, 1st Southern Exp Fleet 15.02.42–10.04.42
      AM Div 41, 12th Base Force, 1st South Exp, SW Area 10.04.42–15.06.43
      ? ?
   Fate: Sunk 15.01.45 by mine south of Penang (05°18'N , 100°20'E).  
   Removed from Navy List: 10.08.1945
   Commanding Officers:  
      Resv Lt(jg) Makata Nobuo眞方信男10.11.41–
Kyo Maru No. 3    第三京丸
   Builder: Tsurumi Seitetsu Zosen
   Owner: Kyokuyo Hogei  
   Call Sign: JMTM  
   Official Number: 45155  
   Laid Down: 25.01.1938
   Launched: 18.07.1938
   Completed (341 GRT): 20.09.1938
   Requisitioned: 10.11.1941
   Service:  
      AM Div 41, Sasebo ND 12.41–15.02.42
      AM Div 41, 12th Base Force, 1st Southern Exp Fleet 15.02.42–10.04.42
      AM Div 41, 12th Base Force, 1st South Exp, SW Area 10.04.42–01.04.43
   Fate:sunk 26.02.43 by mine off Rangoon  
   Removed from Navy List: 01.04.1943
   Commanding Officers:  
      Resv Lt(jg) Takatsu Gengo高津源吾10.11.41–
Meshima Maru    女島丸  
   Builder: Namura Zosen Tekkosho
   Owner: Kyushu Shosen  
   Call Sign: JXPB  
   Official Number: 33605  
   Laid Down:  
   Launched: 01.08.1928
   Completed (336 GRT)  
   Requisitioned: 20.09.1941
   Service:  
   AM Div 33, Kure ND 01.12.1941
   AM Div 33, 7th Fleet 10.04.45–10.07.45
   Fate: Sunk 26.04.45 by mine in Shimonoseki Straits.  
   Removed from Navy List: 10.07.1945
   Commanding Officers:  
      Resv Lt(jg) Itsuki Saichi齋 佐一20.08.41–10.05.44
      Resv Lt Ueno Susumu上野 将10.05.44–
Misago Maru No. 1    第一鶚丸  
   Builder: Harima Zosensho
   Owner: Takasago Gyogyo  
   Call Sign: JIMA  
   Official Number: 26856  
   Laid Down: 28.07.1920
   Launched: 02.10.1920
   Completed (265 GRT): 14.12.1920
   Requisitioned: 16.12.1940
      ? ?
      AM Div 25, Yokosuka ND 12.41–01.11.43
      ? ?
   Fate: Sunk 15.04.45 by USS Cero (SS-225) off Todo-saki (39°35'N, 142°06'E).  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
    Resv Lt(jg) Sasaki Takeo佐々木 赳夫15.12.40–15.02.41
    Resv Lt(jg) Fukase Eijiro深瀬 英次郎15.02.41–17.03.42
    Resv Lt(jg) Santoki Kenichi山時謙一17.03.42–17.01.44
    Resv Lt Iwanaga Hideo岩永秀雄17.01.44–30.03.44
    Resv Lt Kadwaki ]?]門脇稚夫30.03.44–
Misago Maru No. 3    第三鶚丸  
   Builder: Kobe Seikosho Toba Zosensho
   Owner: Takasago Gyogyo  
   Call Sign: JINA  
   Official Number: 27925  
   Laid Down:  
   Launched: 01.01.1921
   Completed (267 GRT)  
   Requisitioned: 16.12.1940
   Service:  
      ? ?
      AM Div 25, Yokosuka ND 12.41–01.11.42
      ? ?
   Fate: Sunk 27.05.45 by US aircraft of Ise Wan (34°37'N, 137°19'E).  
   Removed from Navy List: 10.07.1945
   Commanding Officers:  
      Resv Lt(jg) Irie Ichizo川本和雄16.12.40–
      Resv Lt Kurita Toshio栗田敏雄25.07.43–22.01.45
      Resv Lt Kato Zenichiro加藤 善一郎22.01.45–03.45
      Resv Lt Matsumoto Nobuto松本信人03.45–04.45
      Resv Lt Hashimoto Masahiro橋本正煕04.45–10.07.45
Misago Maru No. 8    第八鶚丸  
   Builder: Kobe Seikosho Toba Zosensho
   Owner: Takasago Gyogyo  
   Call Sign: JCWA  
   Official Number: 28777  
   Laid Down:  
   Launched: 18.10.1922
   Completed (281 GRT)  
   Requisitioned: 04.12.1941
   Service:  
      AM Div 45, Bako Guard District 12.41–
      AM Div 45 –20.10.44
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 30.04.1946
   Commanding Officers:  
      Resv Lt(jg) Eri Takumi江里 工04.12.41–02.02.42
      Resv Lt(jg) Ueki Chiyokichi植木 千代吉02.02.42–
Misago Maru No. 11    第十一鶚丸  
   Builder: Kobeseikosho Harima Zosen Kojo
   Owner: Takasago Gyogyo  
   Call Sign: JWOB  
   Official Number: 33582  
   Laid Down: 15.06.1928
   Launched: 28.08.1928
   Completed (318 GRT): 29.09.1928
   Requisitioned: 20.09.1941
   Service:  
      ? ?
   Fate: Sunk 12.11.43 by unknown causes  
   Removed from Navy List: 05.06.1944
   Commanding Officers:  
      Resv Lt (jg) Irie Ichizo入江一三20.09.41–
Miyo Maru    美代丸  
   Builder: Sanoyasu Dock
   Owner: Marui Kisen  
   Call Sign: JNYL  
   Official Number: 42938  
   Laid Down:  
   Launched: 01.12.1936
   Completed (335 GRT): 16.02.1937
   Requisitioned: 22.10.1941
      AM Div 33, Kure ND 01.12.1941
      ? ?
      AM Div 33, 7th Fleet 10.04.45–01.06.45
      ? ?
   Fate: Surrendered  
   Removed from Navy List: ?
   Commanding Officers:  
      Resv Lt(jg) Ueyanagi Risaburo上柳利三郎22.10.41–25.09.44
      Resv Lt(jg) Santoki Kenichi山時謙一25.09.44–
Musashi Maru    武藏丸  
   Builder: Uchida Zosen
   Owner: Nippon Suisan  
   Call Sign: JCCA  
   Official Number: 27509  
   Laid Down:  
   Launched: 01.09.1920
   Completed (227 GRT)  
   Requisitioned: 01.12.1941
   Service:  
      AM Div 45, Bako Guard District 12.41–16.07.42
   Fate: Sunk 16.07.42 some 100 nm E of Nojimasaki (34°50'N, 142°00'E).  
   Removed from Navy List: ?
   Commanding Officers:  
      Resv Lt(jg) Misato Kouichi美郷幸一01.12.41–16.07.42
Naruo Maru    鳴尾丸  
   Builder: Osaka Tekkosho Innoshima Kojo
   Owner: Nippon Suisan  
   Call Sign: JKDA  
   Official Number: 28733  
   Laid Down:  
   Launched: 05.12.1922
   Completed (216 GRT): 01.12.1922
   Requisitioned: 01.11.1940
   Service:  
      ? ?
      AM Div 25, Yokosuka ND 12.41–10.08.44
   Fate: Sunk 25.12.43 by USS Gunnard NE of Daiozaki  
   Removed from Navy List: 10.08.1944
   Commanding Officers:  
      Resv Lt(jg) Matsuoka松岡?01.11.40–16.11.41
      Resv Lt(jg) Amano Kousei天野孝哉16.11.41–29.07.43
      Resv Lt Abe Mutsuo阿部六郎29.07.43–25.12.43
Noshiro Maru No. 2 Go    第二號能代丸  
   Builder: Osaka Tekkosho Innoshima Kojo
   Owner: Nippon Suisan  
   Call Sign: JSIA  
   Official Number: 28754  
   Laid Down:  
   Launched:  
   Completed (216 GRT): 01.10.1923
   Requisitioned: 16.12.1940
   Service:  
      ? ?
   Fate: Sunk 01.04.44 by USS Haddock (SS-231) 120 nm east of Haha Jima  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt(jg) Aoyagi Tsukasa青柳誌郎16.12.40–01.10.41
      Resv Lt Shibata Masayoshi柴田正義01.10.41–01.04.44
Oi Maru    大井丸  
   Builder: Mitsubishi Jukogyo Hikoshima Zosensho
   Owner: Sankyo Kaiun  
   Call Sign: JCIN  
   Official Number: 45392  
   Laid Down: 03.08.1938
   Launched: 07.03.1939
   Completed (396 GRT): 22.04.1939
   Requisitioned: 12.09.1941
   Service:  
      AM Div 31, 2nd Base Force, 3rd Fleet 12.41–10.03.42
      AM Div 31, 32nd Base Force, 3rd Southern Exp 10.03.42–
      AM Div 31 –10.05.44
      Reclassified as Submarine Chasher 10.05.44  
      ? ?
   Fate: Sunk 10.06.44  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Kobayashi Toshiaki小林利明12.09.41–
Otowa Maru    音羽丸  
   Builder: Osaka Tekkosho Sakurajima Kojo
   Owner: Nippon Suisan  
   Call Sign: JIJA  
   Official Number: 27092  
   Laid Down:  
   Launched: 01.03.1920
   Completed (220 GRT): 01.03.1920
   Requisitioned: 05.10.1940
   Service:  
      ? ?
   Fate: Sunk 12.01.45 by US aircraft off Cam Ranh Bay (11°50'N, 109°00'E). 
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt Nagahashi Kimata長橋喜間太31.07.41–
Ranzan Maru    嵐山丸  
   Builder: Osaka Tekkosho Bingo Kojo
   Owner: Nippon Suisan  
   Call Sign: JCIA  
   Official Number: 27512  
   Laid Down:  
   Launched: 01.10.1920
   Completed (219 GRT): 01.10.1920
   Requisitioned: 16.12.1940
   Service:  
      ? ?
   Fate: Sunk details unknown  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Sumifuku Yukomi住福幸臣16.12.40–21.02.41
      Resv Lt (jg) Tanaka Zenji田中善次21.02.41–
Reisui Maru    麗水丸  
   Builder: Osaka Tekkosho Innoshima Kojo
   Owner: Nippon Suisan  
   Call Sign: JBBA  
   Official Number: 27102  
   Laid Down:  
   Launched: 28.04.1920
   Completed (219 GRT): 01.05.1920
   Requisitioned: 20.12.1941
   Service:  
      AM Div 41, Sasebo ND 20.12.41–15.02.42
      AM Div 41, 12th Base Force, 1st Southern Exp Fleet 15.02.42–10.04.42
      AM Div 41, 12th Base Force, 1st South Exp, SW Area 10.04.42–15.06.43
      ? ?
   Fate: Sunk 25.12.44 in Malacca Straits (03°19'N, 99°45'E).  
   Removed from Navy List: 10.04.1945
   Commanding Officers:  
      Resv Lt (jg) Nakayama Masao中山正雄20.12.41–25.10.42
      Resv Lt (jg) Tanaka Nubuo田中房男25.10.42–
Rikuzen Maru    陸前丸  
   Builder: Osaka Tekkosho Bingo Kojo
   Owner: Nippon Suisan  
   Call Sign: JIIA  
   Official Number: 26702  
   Laid Down:  
   Launched: 01.03.1920
   CompletedCompleted (221 GRT)  
   Requisitioned: 16.12.1940
   Service:  
      ? ?
      AM Div 49, Chinkai Guard District 12.41–
      AM Div 49 –15.08.45
   Fate: Sunk 26.07.45 off Hazhuman Korea (37°58'N, 125°40'E).  
   Removed from Navy List: 15.08.1945
   Commanding Officers:  
    Resv Lt (15.12.16)  水谷 勝二 ?
    Resv Lt (jg) Shigetomi Hideo重富秀男05.05.41–20.10.41
    Resv Lt (jg) Sakamoto Tadashi坂元 正20.10.41–25.12.44
    Resv Lt Higashiuchi Fumio東内文男25.12.44–10.02.45
    Resv Lt Tsunematsu Saburo常松三郎10.02.45–26.07.45
Rokko Maru    六甲丸  
   Builder: Mitsubishi Zosen Kobe Zosensho
   Owner: Nippon Suisan  
   Call Sign: JJTG  
   Official Number: 41969  
   Laid Down: 23.09.1919
   Launched: 03.11.1919
   Completed (225 GRT): 13.12.1919
   Requisitioned: 01.12.1941
   Service:  
      AM Div 45, Bako Guard District 01.12.41–
      AM Div 45 –20.10.44
   Fate: Sunk 16.10.44  
   Removed from Navy List: ?
   Commanding Officers:  
      Resv Lt (jg) Nakahara Tokimasa中原時正01.12.41–02.45
      Resv Lt Fujisaki Michiyoshi藤崎道好02.45–04.45
      Resv Lt Samejima Keiji鮫島 恵04.45–
Rumoi Maru    留萌丸  
   Builder: Osaka Tekkosho Sakurajima Kojo
   Owner: Nippon Suisan  
   Call Sign: JILA  
   Official Number: 26708  
   Laid Down:  
   Launched: 20.03.1920
   Completed (220 GRT): 01.03.1920
   Requisitioned: 01.11.1940
   Service:  
      ? ?
   Fate: Sunk 07.08.45  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Deuchi Masao出口正男31.07.41–02.45
      Resv Lt Norisue Minoru則末 實02.45–
Saishu Maru No. 1    第1済州丸    ウシュイサ  
   Builder: [Nagasaki ?]
   Owner: Saishuto Gyogyo  
   Call Sign: JIXG  
   Official Number: C2253  
   Laid Down:  
   Launched: 01.12.1922
   Completed (80 GRT)  
   Requisitioned: 16.12.1940
   Service:  
      ? ?
      AM Div 35, Maizuru ND 12.41–
      AM Div 35 –30.06.45
   Fate: unknown  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Hanagita Tsutomu柳田 勉01.10.41–22.03.44
      Resv Lt Katougi Jun加藤木 俊22.03.44–25.04.45
      Resv Lt Matsuura Eitaro松浦榮太郎25.04.45–
Saishu Maru No. 2    第2済州丸    ウシュイサ  
   Builder: [Nagasaki ?]
   Owner: Saishuto Gyogyo  
   Call Sign:  
   Official Number: C2254  
   Laid Down:  
   Launched: 01.12.1922
   Completed (80 GRT)  
   Requisitioned: 16.12.1940
   Service:  
      ? ?
      AM Div 35, Maizuru ND 12.41–
      AM Div 35 –30.06.45
   Fate: unknown  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Ikura Kikuji以倉菊次01.10.41–15.02.44
      Resv Lt Sakaino Minoru境野 實15.02.44–20.06.45
      Resv Lt Miyake Mitsuo三宅三夫20.06.45–
Saishu Maru No. 6    第6済州丸    ウシュイサ  
   Builder: [Nagasaki ?]
   Owner: Saishuto Gyogyo  
   Call Sign: JIZG  
   Official Number: C2256  
   Laid Down:  
   Launched: 01.01.1923
   Completed (80 GRT)  
   Requisitioned: 16.12.1940
   Service:  
      ? ?
      AM Div 42, Sasebo ND 12.41–25.09.42
      ? ?
   Fate: unknown  
   Removed from Navy List: ?
   Commanding Officers:  
      Resv Lt (jg) Kitamura Eiichiro北村 榮一郎15.10.41–10.43
      Lt(jg) Okabe Goro岡部五郎10.43–13.11.43
      Lt(jg) Kuroda Isao黒田勇雄13.11.43–09.44
      Resv Lt Kisaka Nagayoshi木坂直嘉09.44–10.44
      Mid Kaeriyama Tatsue 歸山辰江 10.44-10.44
      Mid Sato Yuusuke佐藤雄亮10.44–11.44
      Resv Lt Kisaka木坂直嘉 11.44-11.44  
      Mid Iwasaki Satoshi岩崎 敏11.44–12.44
      Mid Sato Yuusuke佐藤雄亮12.44–01.45
      Mid Iwasaki Satoshi岩埼 敏01.45–0345
      Mid Sato Yuusuke佐藤雄亮03.45–
Saishu Maru No. 7 第7済州丸    ウシュイサ  
   Builder: [Nagasaki ?]
   Owner: Saishuto Gyogyo  
   Call Sign:  
   Official Number: C2534  
   Laid Down:  
   Launched: 01.12.1923
   Completed (76 GRT)  
   Requisitioned: 16.12.1940
   Service:  
      ? ?
      AM Div 42, Sasebo ND 12.41–25.09.42
      ? ?
   Fate: unknown  
   Removed from Navy List: ?
   Commanding Officers:  
      Resv Lt (jg) Nagao Akira長尾 晃15.10.41–10.43
      Lt Sakuyama Kahei作山嘉平10.43–10.44
      Mid Ota Sadao太田定雄10.44–10–44
      Mid Kaeriyama Tatsue歸山辰江10.44–01.45
      Mid Kaki [?]柿埼圓治01.45–
Sakaki Maru    榊丸  
   Builder: Namura Zosensho
   Owner: Setsuyo Shosen  
   Call Sign: JNVP  
   Official Number: 48512  
   Laid Down: 01.01.1934
   Launched: 15.02.1934
   Completed (275 GRT): 01.03.1934
   Requisitioned: 15.08.1942
   Service:  
      AM Div 32, Osaka Guard District 15.08.42–
      AM Div 32 –01.10.44
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 01.12.1945
   Commanding Officers:  
      Resv Lt Kaneko Susumu金子 進15.08.42–11.44
      Lt(jg) Ichida Shigeru市田 茂11.44–11.01.45
      Lt(jg) Isozaki Yasuyuki磯崎 安之11.01.45–18.01.45
      Lt(jg) Sugino Chuji杉野忠治18.01.45–
Seki Maru    關丸  
   Builder: Hayashikane Shoten Tekko Zosensho
   Owner: Taiyo Hogei  
   Call Sign: JKWL  
   Official Number: 43991  
   Laid Down: 01.03.1937
   Launched: 10.08.1937
   Completed (297 GRT): 01.10.1937
   Requisitioned: 20.09.1941
   Service:  
      AM Div 42, Sasebo ND 20.09.41–25.09.42
      ? ?
   Fate: Sunk 29.03.45 by US aircraft off Tokara Gunto.
   Removed from Navy List: 10.05.1945
   Commanding Officers:  
      Resv Lt (jg) Koremoto Kenichi是本賢一20.09.41–20.05.42
      Resv Lt Funamoto Tadayoshi船本忠義20.05.42–30.12.43
      Resv Lt Maruyama Haruyoshi丸山春喜30.12.43–01.02.45
      Resv Lt Shiroshita Tomofusa城下友房01.02.45–29.03.45
Seki Maru No. 3    第三關丸  
   Builder: Moss Værft & Dokk, Jeløya, Moss, Norway
   Owner: Taiyo Hogei  
   Call Sign: JWCN  
   Official Number: 47279  
   Laid Down:  
   Launched: 01.09.1939
   Completed (300 GRT)  
   Requisitioned: 20.09.1941
   Service:  
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Iwata Sueji岩田末治20.09.41–07.44
      Resv Lt Doi Kiyoshi土井清至07.44–
Senyu Maru No. 2    第二鮮友丸  
   Builder:
   Owner: Kure Kokumotu Oroshi Shogyo Kumiai  
   Call Sign: JTOJ  
   Official Number: 39992  
   Laid Down: 01.10.1934
   Launched: 01.12.1934
   Completed (300 GRT): 01.12.1934
   Requisitioned: 12.09.1941
   Service:  
      AM Div 32, Osaka Guard District 12.41–
      AM Div 32 –01.10.44
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 01.12.1945
   Commanding Officers:  
      Resv Lt(jg) Funaki Kiyoto船木清登12.09.41–
Senyu Maru No. 3    第参鮮友丸  
   Builder: Goshi Kaisha Urabe Zosen Tekkosho
   Owner: Kure Kokumotu Oroshi Shogyo Kumiai  
   Call Sign: JASK  
   Official Number: 41587  
   Laid Down: 01.10.1935
   Launched: 01.01.1936
   Completed (327 GRT): 01.02.1936
   Requisitioned: 20.09.1941
   Service:  
      ? ?
      AM Div 32, Osaka Guard District 12.41–
      AM Div 32 –01.10.44 44
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 20.09.1941
   Commanding Officers:  
      Resv Lt (jg) Fukigami Kiyomitsu吹上清光16.09.41–15.12.41
      Resv Lt (jg) Kaneko Susumu         金子 進15.12.41–05.01.42
      Resv Lt (jg) Fukuchi Yoshimi福地 好05.01.42–15.08.43
      Resv Lt Koike Mitsuo小池三雄15.08.43–04.02.45
      Resv Lt Murata Minoru村田 豊04.02.45–
Shin Tohoku Maru    新東北丸  
   Builder: Endo Tekkosho
   Owner: Kanamori Shosen  
   Call Sign: JLDI  
   Official Number: 31157  
   Laid Down:  
   Launched: 06.07.1925
   Completed (352 GRT)  
   Requisitioned: 12.09.1941
   Service:  
      AM Div 25, Yokosuka ND 12.09.41–01.11.42
   Fate: Surrendered  
      ? ?
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Yaguchi Masaru矢口 勝12.09.41–21.11.42
      Resv Lt Komori Satoshi小森 敏21.11.42–11.43
      Resv Lt Hirabayashi Shinichi平林眞一11.43–09.44
      Resv Lt Matsuume Seiji松梅誠治09.44–10.44
      CWO Asano [?]淺野 今朝記10.44–11.44
      Resv Lt Matsuume Seiji松梅誠治11.44–
Shinura Maru    新浦丸  
   Builder: Matsuo Tekkosho
   Owner: Goshi Kaisha Kurata Shokai  
   Call Sign: JKLK  
   Official Number: 41896  
   Laid Down: 01.07.1936
   Launched: 30.10.1936
   Completed (294 GRT): 01.11.1936
   Requisitioned: 20.12.1941
   Service:  
      ? ?
   Fate: Sunk 10.10.44  
   Removed from Navy List: 10.01.1946
   Commanding Officers:  
      Resv Lt Okuyama [?]奥山鐡茂20.12.41–10.07.42
      Resv Lt(jg) Suzuki Masao鈴木正雄10.07.42–17.07.44
      Resv Lt Ishida Masaharu石田正治17.07.44–
Shonan Maru No. 16    第十六昭南丸  
   Builder: Osaka Tekkosho Honsha Kojo
   Owner: Nippon Suisan  
   Call Sign: JLXO  
   Official Number: 47663  
   Laid Down:  
   Launched: 31.07.1940
   Completed (354 GRT): 20.11.1940
   Requisitioned: 20.09.1941
   AM Div 50, Ryujun Guard District 20.09.41–10.04.42
      ? ?
   Fate: Sunk 24.03.45 by US aircraft off Amami-Oshima (29°12'N, 126°13'E).
   Removed from Navy List: 24.03.1945
   Commanding Officers:  
      Resv Lt (jg) Tamaari Isamu玉有 勇20.09.41–
      Resv Lt Tsunokai Takeo角皆武雄–24.03.45
Showa Maru No. 7    第七昭和丸  
   Builder: Osaka Tekkosho Honsha Kojo
   Owner: Nippon Suisan  
   Call Sign: JIRK  
   Official Number: 41979  
   Laid Down: 01.04.1936
   Launched: 24.07.1936
   Completed (264 GRT): 31.08.1936
   Requisitioned: 12.09.1941
   Service:  
      ? ?
   Fate: Surrendered:  
   Removed from Navy List: 10.03.1945
   Commanding Officers:  
      Resv Lt (jg) Takahashi高橋輝藏12.09.41–18.09.41
      Resv Lt Terauchi Saburo寺内三郎18.09.21–01.05.44
      Resv Lt Tanaka Ginzo田中銀造01.05.44–
Showa Maru No. 8    第八昭和丸  
   Builder: Osaka Tekkosho Honsha Kojo
   Owner: Nippon Suisan  
   Call Sign: JISK  
   Official Number: 41980  
   Laid Down: 01.04.1936
   Launched: 24.07.1936
   Completed (264 GRT): 31.08.1936
   Requisitioned: 12.09.1941
   Service:  
      ? ?
   Fate: Surrendered  
   Removed from Navy List:  
   Commanding Officers:  
      Resv Lt Kawai Iitsuka河合 彌12.09.41–25.08.43
      Resv Lt Kusegawa Shinji久瀬川晋二25.08.43–
Showa Maru No. 10    第十昭和丸    ショウワ  
   Builder: Osaka Tekkosho Honsha Kojo
   Owner: Nippon Suisan  
   Call Sign: JITK  
   Official Number: 41981  
   Laid Down: 01.04.1936
   Launched: 24.07.1936
   Completed (264 GRT): 01.08.1936
   Requisitioned: 01.12.1941
   Service:  
      AM Div 26, Yokosuka ND 01.12.41–
      AM Div 26 –31.07.45
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) MatsuMaru Taketoshi松丸武俊01.12.41–
      Resv Lt Kisaka Naoyashi木坂直嘉25.11.44–
Sonobe Maru    園部丸  
   Builder: Osaka Tekkosho Innoshima Kojo
   Owner: Nippon Suisan  
   Call Sign: JACA  
   Official Number: 27098  
   Laid Down:  
   Launched: 01.04.1920
   Completed (220 GRT): 01.04.1920
   Requisitioned: 16.12.1940
   Service:  
      AM Div 27, Ominato Guard District 12.41–10.06.44
      ? ?
   Fate: Sunk 14.07.45 by US aircraft off Hiroo, Hokkaido (42°11'N, 143°36'E).
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Adachi Masashi足達正士16.12.40–20.09.41
      Resv Lt Yamaguchi Hiroshi 山口 浩15.06.43–01.45
      Resv Lt Osada Seiichiro長田清一郎01.45–
Taian Maru    太安丸  
   Builder: Mukaishima Dock
   Owner: Nishinihon Kisen  
   Call Sign: JFFG  
   Official Number: C1455  
   Laid Down:  
   Launched: 08.09.1930
   CompletedCompleted (199 GRT)  
   Requisitioned: 20.12.1941
   Service:  
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Sakui Keijiro作井 慶二郎20.12.41–
Taihei Maru No. 3 Go    第三號太平丸  
   Builder: Mukaishima Dock
   Owner: Nishinihon Kisen  
   Call Sign: JFGG  
   Official Number: C1457  
   Laid Down:  
   Launched: 01.10.1930
   Completed (197 GRT)  
   Requisitioned: 22.12.1941
   Service:  
      AM Div 47 12.41–10.04.42
      ? ?
   Fate: Surrendered  
   Removed from Navy List: ?
   Commanding Officers:  
      Resv Lt (jg) Kumabe Itsuo隈部五夫20.09.41–
      Resv Lt Iizuka Hitoshi飯塚 均20.12.44–
Taisei Maru    太西丸  
   Builder: Mitsubishi Zosen Hikoshima Zosensho
   Owner: Nishinihon Kisen  
   Call Sign: JFTG  
   Official Number: C1539  
   Laid Down: 01.07.1932
   Launched: 08.08.1932
   Completed (225 GRT): 30.09.1932
   Requisitioned: 20.09.1941
   Service:  
      AM Div 48, Chinkai Guard District 12.41–
      AM Div 48 –09.45
   Fate:surrendered  
   Removed from Navy List: 01.12.1945
   Commanding Officers:  
      Resv Lt (jg) Isazuka Norimoto伊佐坂 則元20.09.41–
      Resv Lt (20.01.15)中井 茂喜?
Taito (Daito) Maru    太東丸  
   Builder: Mitsubishi Zosen Hikoshima Zosensho
   Owner: Nishinihon Kisen  
   Call Sign: JFUG  
   Official Number: C1540  
   Laid Down: 01.07.1932
   Launched: 20.08.1932
   Completed (267 GRT): 30.09.1932
   Requisitioned: 20.09.1941
   Service:  
      ? ?
      AM Div 48, Chinkai Guard District 12.41–
      AM Div 48 –9.45
   Fate: Sunk 16.08.44 by USS Croaker west of Korea (36°15'N, 125°52'E).  
   Removed from Navy List: 01.12.1945
   Commanding Officers:  
      Resv Lt (jg) Nagakura Tsuneo長倉常雄20.09.41–
      Resv Lt Matsumoto Yoshiaki松本義明05.02.43–
Takao Maru    高雄丸  
   Builder: Osaka Tekkosho Innoshima Kojo
   Owner: Nippon Suisan  
   Call Sign: JIDA  
   Official Number: 27091  
   Laid Down:  
   Launched: 01.04.1920
   Completed (220 GRT): 01.04.1920
   Requisitioned: 20.12.1941
   Service:  
      AM Div 41, Sasebo ND 20.12.41–15.02.42
      AM Div 41, 12th Base Force, 1st Southern Exp Fleet 15.02.42–10.04.42
      Div 41, 12th Base Force, 1st South Exp, SW Area 10.04.42–15.06.43
      ? ?
   Fate: Sunk 12.09.44 by aircraft from US Navy TF 38 between Biliran and Cebu, Philippines.  
   Removed from Navy List: ?
   Commanding Officers:  
      Resv Lt (jg) Yamaguchi Hiroshi山口 浩01.12.41–
Takasago Maru    高砂丸  
   Builder: Kobe Seikosho Toba Zosensho
   Owner: Nippon Suisan  
   Call Sign: J NMA  
   Official Number: 28220  
   Laid Down:  
   Launched: 13.10.1921
   CompletedCompleted (275 GRT)  
   Requisitioned: 10.12.1944
   Service:  
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 05.11.1937
   Commanding Officers:  
      Resv Lt (jg) Kawahara Masashi河原政賴13.11.37–
      Resv Lt (jg) Kawahara Masashi河原政賴20.07.39–
      Resv Lt (jg) Hosono Masao 1細野正男5.01.41–05.44
      Resv Lt Ueda Hiroe上田廣衛05.44–
Takashima Maru No. 2    第二高島丸  
   Builder: Mitsubishi Zosen Hikoshima Zosensho
   Owner: Uwajima Unyu  
   Call Sign: JHCF  
   Official Number: 38697  
   Laid Down: 07.06.1933
   Launched: 15.08.1933
   Completed (161 GRT): 16.09.1933
   Requisitioned: 20.09.1941
   Service:  
      ? ?
   AM Div 32, Osaka Guard District 12.41–15.08.42
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 15.08.1942
   Commanding Officers:  
      Resv Lt (jg) Sawatari Noboru猿渡 登20.09.41–
Takashima Maru No. 3    第三高島丸  
   Builder: Mitsubishi Zosen Hikoshima Zosensho
   Owner: Uwajima Unyu  
   Call Sign: JHDF  
   Official Number: 38698  
   Laid Down: 07.06.1933
   Launched: 15.08.1933
   Completed (161 GRT): 16.09.1933
   Requisitioned: 10.10.1941
   Service:  
      ? ?
      AM Div 32, Osaka Guard District 12.41–
      AM Div 32 –01.10.44
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 01.12.1945
   Commanding Officers:  
      Resv Lt (jg) Mizusawa Sadanori水澤定則10.10.41–20.07.44
      Resv Lt Takeoka Yoshio竹岡良雄20.07.44–
Takunan Maru No. 1    第一拓南丸  
   Builder: Osaka Tekkosho Honsha Kojo
   Owner: Nippon Suisan  
   Call Sign: JWEL  
   Official Number: 43502  
   Laid Down: 01.02.1937
   Launched: 01.05.1937
   Completed (343 GRT): 24.07.1937
   Requisitioned: 20.09.1941
   Service:  
      AM Div 50, Ryujun Guard District 20.09.41–10.04.42
      ? ?
   Fate:sunk 10.10.44 by US aircraft off Okinodaitoshima (25°30'N, 131°00'E).
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Suzuki [?]鈴木邦與20.09.41–
Takunan Maru No. 3    第三拓南丸  
   Builder: Osaka Tekkosho Honsha Kojo
   Owner: Nippon Suisan  
   Call Sign: JWHL  
   Official Number: 43629  
   Laid Down: 01.02.1937
   Launched: 14.05.1937
   Completed (343 GRT): 10.08.1937
   Requisitioned: 11.04.1941
   Service:  
      AM Div 31, 2nd Base Force, 3rd Fleet 12.41–10.03.42
      AM Div 31, 32nd Base Force, 3rd Southern Exp 10.03.42–
      AM Div 31 –10.05.44
      Reclassified as Submarine Chaser 10.05.1944
      ? ?
   Fate: ?  
   Removed from Navy List: 10.08.1945
   Commanding Officers:  
      Resv Lt (jg) Nakane Kazumasa中根一正11.04.41–25.06.43
      Resv Lt Murakami Haruo村上治夫25.06.43–01.06.45
      Resv Lt Ishida Masaharu石田正治01.06.45–
Takunan Maru No. 8    第八拓南丸  
   Builder: Osaka Tekkosho Honsha Kojo
   Owner: Nippon Suisan  
   Call Sign: JWLL  
   Official Number: 43652  
   Laid Down:  
   Launched: 22.07.1937
   Completed (343 GRT): 31.08.1937
   Requisitioned: 11.04.1941
   Service:  
      AM Div 31, 2nd Base Force, 3rd Fleet 12.41–10.03.42
      AM Div 31, 32nd Base Force, 3rd Southern Exp 10.03.42–
      AM Div 31 –10.05.44
      Reclassified as Submarine Chasher 10.05.44  
      ? ?
   Fate: ?  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Mizutani Tamatsu水谷 保11.04.41–15.06.43
      Resv Lt Goto Osamu後藤慶藏15.06.43–10.01.45
      Lt Ebara Masao江原正男10.01.45–
Tama Maru    玉丸  
   Builder: Mitsubishi Jukogyo Kobe Zosensho
   Owner: Taiyo Hogei  
   Call Sign: JGHL  
   Official Number: 42339  
   Laid Down: 28.05.1936
   Launched: 05.08.1936
   Completed (264 GRT): 28.09.1936
   Requisitioned: 15.08.1941
   Service:  
      ? ?
   Fate: Sunk 04.05.42 by USS Yorktown (CV-5) off Tulagi (09°07'S 160°12'E).  
   Removed from Navy List: 25.05.1942
   Commanding Officers:  
      Resv Lt (jg) Shiihara [?]椎原茂武15.08.41–
Tama Maru    多摩丸  
   Builder: Mitsubishi Jukogyo Hikoshima Zosensho
   Owner: Sankyo Kaiun  
   Call Sign: JCFN  
   Official Number: 45388  
   Laid Down: 03.08.1938
   Launched: 28.02.1939
   Completed (396 GRT): 01.04.1939
   Requisitioned: 12.09.1941
   Service:  
      ? ?
      Reclassified as Submarine Chasher 20.05.1944
      ? ?
   Fate: Sunk 08.04.45  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt Funaki Takashi船木 隆12.09.41–19.05.43
      Resv Lt Yoshino Teruhiko吉野輝彦19.05.43–10.44
      Lt Shinoo Matao新野尾 又雄10.44–
Tama Maru No. 2    第二玉丸  
   Builder: Mitsubishi Jukogyo Kobe Zosensho
   Owner: Taiyo Hogei  
   Call Sign: JGIL  
   Official Number: 42340  
   Laid Down: 28.05.1936
   Launched: 05.08.1936
   Completed (264 GRT): 28.09.1936
   Requisitioned: 15.08.1941
   Service:  
      ? ?
   Fate: Sunk 12.03.42  
   Removed from Navy List: 01.04.1942
   Commanding Officers:  
      Resv Lt (jg) Sasaki Haruhiko佐々木 春彦15.08.41–12.03.42
Tama Maru No. 3    第三玉丸  
   Builder: Mitsubishi Jukogyo Hikoshima Zosensho
   Owner: Taiyo Hogei  
   Call Sign: JMJK  
   Official Number: 42332  
   Laid Down: 25.04.1936
   Launched: 06.08.1936
   Completed (257 GRT): 27.09.1936
   Requisitioned: 12.09.1941
   Service:  
      ? ?
   Fate: Sunk 30.01.44  
   Removed from Navy List: 31.03.1944
   Commanding Officers:  
      Resv Lt (jg) Yamaguchi Atsutoshi山口篤利12.09.41–18.10.43
      Resv Lt Yoshii Jiro吉井次郎08.10.43–30.01.44
Tama Maru No. 5    第五玉丸  
   Builder: Mitsubishi Jukogyo Hikoshima Zosensho
   Owner: Taiyo Hogei  
   Call Sign: JMKK  
   Official Number: 42333  
   Laid Down: 25.04.1936
   Launched: 06.08.1936
   Completed (257 GRT): 27.09.1936
   Requisitioned: 12.09.1941
   Service:  
      ? ?
   Fate: ?  
   Removed from Navy List: 31.03.1944
   Commanding Officers:  
      Resv Lt Takato Akiro高遠 章12.09.41–17.08.43
      Resv Lt Fukigami Kiyomitsu吹上清光17.08.43–
Tama Maru No. 6    第六玉丸  
   Builder: Fujinagata Zosensho
   Owner: Taiyo Hogei  
   Call Sign: JIUK  
   Official Number: 42329  
   Laid Down: 01.03.1936
   Launched: 20.07.1936
   Completed (275 GRT): 01.09.1936
   Requisitioned: 11.04.1941
   Service:  
      ? ?
      SC Div 56, 4th Base Force, 4th Fleet 12.41–01.02.42
      SC Div 56, 8th Base Force, 4th Fleet 01.02.42–14.07.42
      SC Div 56, 8th Base Force, 8th Fleet 14.07.42–24.12.42
      SC Div 56, 8th Base Force, 8th Fleet, SE Area Fleet 24.12.42–31.03.43
      AM Div 31, 2nd Base Force, 3rd Fleet 12.41–10.03.42
      AM Div 31, 32nd Base Force, 3rd Southern Exp 10.03.42–
      AM Div 31 –10.05.44
      Reclassified as Submarine Chasher 10.05.1944
      ? ?
   Fate: Sunk 09.08.44  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Nishida Hiroshi西田祐志11.04.41–25.07.43
      Resv Lt Ishii Hideo石井英夫25.07.43–09.08.44
Tama Maru No. 7    第七玉丸  
   Builder: Fujinagata Zosensho
   Owner: Taiyo Hogei  
   Call Sign: JIVK  
   Official Number: 42330  
   Laid Down: 01.03.1936
   Launched: 22.07.1936
   Completed (275 GRT): 01.09.1936
   Requisitioned: 11.04.1941
   Service:  
      ? ?
      AM Div 31, 2nd Base Force, 3rd Fleet 12.41–10.03.42
      AM Div 31, 32nd Base Force, 3rd Southern Exp 10.03.42–
      AM Div 31 –10.05.44
      Reclassified as Submarine Chasher 10.05.1944
      ? ?
   Fate: Sunk 18.06.44  
   Removed from Navy List: 10.08.1944
   Commanding Officers:  
      Resv Lt (jg) Fujita Yoshinao藤田義直04.11.41–20.04.43
      Resv Lt Koga Shunji古賀春次20.04.43–
Tamasono Maru No. 1    第一玉園丸  
   Builder: Teikoku Kisen Toba Zosensho
   Owner: Nippon Suisan  
   Call Sign: JELB  
   Official Number: 27634  
   Laid Down:  
   Launched: 01.08.1920
   Completed (313 GRT) ?
   Requisitioned: 05.11.1937
   Service:  
      ? ?
      AM Div 27, Ominato Guard District 12.41–10.06.44
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt(jg) Sujimoto Yasumasa杉本安政13.12.37–
      Resv Lt(jg) Yoshida Komao吉田駒雄03.39–
      Resv Lt(jg) Unno Kiyoshi海野 靖18.11.40–25.05.43
      Resv Lt(jg) Asano Ginichi淺野銀一25.05.43–3.45
      Resv Lt Furukawa [?]古川桃治03.45–
Tamasono Maru No. 2    第二玉園丸  
   Builder: Teikoku Kisen Toba ZosenshoTeikoku Kisen Toba Zosensho
   Owner: Nippon Suisan  
   Call Sign: JJRG  
   Official Number: 41967  
   Laid Down:  
   Launched: 01.10.1920
   CompletedCompleted (316 GRT)  
   Requisitioned: 19.05.1938
   Service:  
      ? ?
      AM Div 27, Ominato Guard District 12.41–10.06.44
      ? ?
   Fate: Sunk 14.07.45 by US aircraft off Hokkaido (42°58'N, 144°25'E.)
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
    Resv Lt Sakuma Kouichi佐久間 耕一19.05.38–03.39
    Resv Lt(jg) Nagamne Tamesaburo長嶺為三郎03.39–11.40
      Resv Lt(jg)Yoshida Komao吉田駒雄11.40–20.12.40
      Resv Lt(jg) Yokomizo Toshio横溝俊雄21.12.40–05.09.43
      Lt Kawakami Taishi河上大四05.09.43–24.04.45
      Lt Tanada Hajime棚田僖朔24.04.45–14.07.45
Tamasono Maru No. 3    第三玉園丸  
   Builder: Teikoku Kisen Toba Zosensho
   Owner: Nippon Suisan  
   Call Sign: JENB  
   Official Number: 41970  
   Laid Down:  
   Launched: 01.12.1920
   Completed (316 GRT) ?
   Requisitioned: 07.06.1938
   Service:  
      ? ?
   Fate: Surrendered  
   Removed from Navy List: ?
   Commanding Officers:  
      Resv Lt Segawa Iwao瀬川岩雄07.06.38–
      Resv Lt(jg) Hino Chiyomatsu日野千代松15.01.41–
      Lt TsuakiYukihiko津穐幸彦01.01.44–
Tamura Maru    田村丸  
   Builder: Tokyo Ishikawajima Zosensho
   Owner: Nippon Suisan  
   Call Sign: JWCB  
   Official Number: 30530  
   Laid Down:  
   Launched: 01.02.1920
   Completed (236 GRT) ?
   Requisitioned: 16.12.1940
   Service:  
      ? ?
      AM Div 49, Chinkai Guard District 12.41–
      AM Div 49 –15.08.45
   Fate: Surrendered  
   Removed from Navy List: 01.12.1945
   Commanding Officers:  
    Resv Lt (jg) Kojima Takeo小島武雄16.12.40–12.05.41
    Resv Lt(jg) Yamada Tsunezo山田常三12.05.41–31.05.41
    Resv Lt Utsumi Yasuo宇津見 育郎15.05.44–
Togo Maru    東郷丸  
   Builder: Endo Tekkosho
   Owner: Kanamori Shosen  
   Call Sign: JEHI  
   Official Number: 29072  
   Laid Down:  
   Launched: 30.09.1923
   Completed (362 GRT) ?
   Requisitioned: 12.09.1941
   Service:  
      ? ?
      AM Div 25. Yokosuka ND 12.41–01.11.42
      ? ?
   Fate: Sunk 15.04.45 by USS Cero off Todosaki (39°30'N, 142°10'E).  
   Removed from Navy List: 10.07.1945
   Commanding Officers:  
      Resv Lt Kouse Hiroyuki廣瀬廣行12.09.41–02.05.42
      Resv Lt (jg) Umeza Takeo梅津武雄02.05.42–10.11.43
      Resv Lt Hirakami Tsunehiro平上常廣10.11.43–9.44
      Resv Lt Aoyagi Ryoichiro青柳良一郎09.44–12.44
      Resv Lt Fujikawa Kanji藤川勘治12.44–15.04.45
Tokuho Maru No. 5    第五德豊丸  
   Builder: Ishihara Zosensho
   Owner: Gunichi Seto  
   Call Sign: JUGJ  
   Official Number: 39394  
   Laid Down:  
   Launched: 01.07.1934
   Completed (235 GRT) ?
   Requisitioned: 20.09.1941
   Service:  
      ? ?
      AM Div 33, Kure ND 12.41–
      AM Div 33, 7th Fleet 10.04.45–01.06.45
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 01.12.1945
   Commanding Officers:  
      Resv Lt (jg) Yamashita Yoshio山下義夫20.09.41–25.07.43
      Resv Lt Udono Fumio鵜殿文男25.07.43–25.01.45
      Resv Lt Kuroda Kusuo黒田九州男25.01.45–
Tokuho Maru No. 10    第十德豊丸  
   Builder: Ishihara Zosensho
   Owner: Motoyama Unyu Shoji  
   Call Sign: JCEK  
   Official Number: 40301  
   Laid Down:  
   Launched: 01.05.1935
   Completed (353 GRT) ?
   Requisitioned: 20.12.1941
   Service:  
      ? ?
      AM Div 34, Kure ND 30.12.41–
      AM Div 34 –09.45
   Fate: Surrendered  
   Removed from Navy List: ?
   Commanding Officers:  
      Resv Lt (jg) Suzuki Tsugio鈴木次男20.12.41–15.01.43
      Resv Lt Igarashi Toshio五十嵐 鋭雄15.01.43–30.11.43
      Resv Lt Tsukada Touji塚田藤司30.11.43–10.03.45
      Resv Lt Okuno Cho奥野 長10.03.45–
Torishima Maru    鳥嶋丸  
   Builder: Kobe Seikosho Toba Zosensho
   Owner: Nippon Suisan  
   Call Sign: JEOB  
   Official Number: 28770  
   Laid Down:  
   Launched: 14.09.1922
   Completed (268 GRT) ?
   Requisitioned: 16.12.1940
   Service:  
      ? ?
   Fate: Surrendered  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Matsuoka Katsumi松岡克己06.12.40–30.06.42
      Resv Lt Kiitaka Sadamu橘高 定30.06.42–
Toshi Maru    利丸  
   Builder: Fujinagata Zosensho
   Owner: Taiyo Hogei  
   Call Sign: JWCL  
   Official Number: 43946  
   Laid Down: 01.03.1937
   Launched: 01.07.1937
   Completed (293 GRT): 01.09.1937
   Requisitioned: 05.10.1941
   Service:  
      ? ?
      AM Div 44, Bako Guard District 12.41–20.05.42
      AM Div 44, 9th Base Force, 1st South Exp, SW Area 20.05.42–20.11.43
      AM Div 44, 10th Base Force, 1st South Exp, SW Area 20.11.43–05.02.45
      AM Div 44, 10th Base Force, 1st South Exp Fleet, 10th Area 05.02.45–09.45
   Fate: unknown  
   Removed from Navy List: 10.08.1946
   Commanding Officers:  
      Resv Lt Ozawa Hiroo小澤泰夫15.10.41–
      Resv Lt Satake Masao 佐竹正男–20.08.44
      Resv Lt Ikeda Toraichi池田虎一20.08.44–
Toshi Maru No. 2    第二利丸  
   Builder: Fujinagata Zosensho
   Owner: Taiyo Hogei  
   Call Sign: JWDL  
   Official Number: 43947  
   Laid Down: 01.03.1937
   Launched: 27.07.1944
   Completed (293 GRT): 01.09.1937
   Requisitioned: 05.10.1941
   Service:  
      ? ?
      AM Div 44, Bako Guard District 12.41–20.05.42
      AM Div 44, 9th Base Force, 1st Southern Exp, SW Area 20.05.42–20.11.43
      AM Div 44, 10th Base Force, 1st South Exp, SW Area 20.11.43–05.02.45
      AM Div 44, 10th Base Force, 1st South Exp Fleet, 10th Area 05.02.45–09.45
   Fate: unknown  
   Removed from Navy List: 10.08.1946
   Commanding Officers:  
      Resv Lt (jg) Ikeda Tokiyoshi池田時義05.10.41–
      Resv Lt Kurosaki Mutsumi黒崎睦能01.11.44–
Toshi Maru No. 5    第五利丸  
   Builder: Mihara Zosen Tekkosho
   Owner: Taiyo Hogei  
   Call Sign: JKZL  
   Official Number: 43861  
   Laid Down: 01.03.1937
   Launched: 10.08.1937
   Completed (298 GRT): 24.09.1937
   Requisitioned: 20.09.1941
   Service:  
      ? ?
   Fate: Sunk 04.07.44 off Hahajima (26°30'N, 141°50'E).  
   Removed from Navy List: 01.08.1944
   Commanding Officers:  
      Resv Lt (jg) Kodera Touji小寺藤治20.09.41–01.10.43
      Resv Lt(jg) Nishimura Kihachiro西村喜八郎01.10.43–04.07.44
Toshi Maru No. 7    第七利丸  
   Builder: Hakodate Dock
   Owner: Taiyo Hogei  
   Call Sign: JPLJ  
   Official Number: 43863  
   Laid Down: 01.03.1937
   Launched: 15.07.1937
   Completed (297 GRT): 14.09.1937
   Requisitioned: 20.09.1941
   Service:  
      ? ?
   AM Div 42, Sasebo ND 12.41–25.09.42
      ? ?
   Fate: wrecked 22.07.45 off Sata-Misaki  
   Removed from Navy List: ?
   Commanding Officers  
      Resv Lt (jg) Yoshii Jiro吉井次郎20.09.41–01.09.43
      Resv Lt Matsumoto Takeji松本竹治01.09.43–23.03.44
      Resv Lt Sawade Hisamizu澤出 久23.03.44–22.07.45
Toshi Maru No. 8    第八利丸  
   Builder: Hakodate Dock
   Owner: Taiyo Hogei  
   Call Sign: JPMJ  
   Official Number: 43864  
   Laid Down: 01.03.1937
   Launched: 14.08.1937
   Completed (298 GRT): 01.09.1937
   Requisitioned: 20.09.1941
   Service:  
      ? ?
   Fate: Sunk 31.08.44 by US aircraft off Io Jima.  
   Removed from Navy List: 10.12.1944
   Commanding Officers:  
      Resv Lt (jg) Ito Kouichi伊藤幸一20.09.41–05.08.44
      Resv Lt Uemura Hisao上村久雄05.08.44–31.08.44
Yachiyo Maru    やちよ丸
   Builder: Nakata Zosensho??
   Owner: Shige Kato  
   Call Sign: JCFM  
   Official Number: 43745  
   Laid Down:  
   Launched: 24.11.1937
   Completed (271 GRT): 01.12.1937
   Requisitioned: 20.12.1941
   Service:  
      AM Div 34, Kure ND 12.41–09.45
   Fate: Surrendered  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Kimura Mitsuo木村三雄20.12.41–
      Resv Lt Kobata Fumio古畑文夫20.01.45–
Yoshino Maru    吉野丸
   Builder: Osaka Tekkosho Sakurajima Kojo
   Owner: Nippon Suisen  
   Call Sign: JABA  
   Official Number: 27097  
   Laid Down:  
   Launched: 12.04.1920
   Completed (220 GRT): 16.12.1920
   Requisitioned: 16.12.1940
   Service:  
   AM Div 27, Ominato Guard District 12.41–10.06.44
      ? ?
   Fate: Sunk 14.05.45 by USS Sandlance off Erimosaki.  
   Removed from Navy List: 03.05.1947
   Commanding Officers:  
      Resv Lt (jg) Kamura Masahiko嘉村政彦16.12.40–26.02.41
      Resv Lt (jg) Matsumura Matsuhiko松村光彦26.02.41–31.05.41
      Resv Lt (jg) Yamaguchi Atsutoshi山口篤利31.05.41–12.09.41
      Resv Lt (jg) Nagase Makoto永瀬 誠12.09.41–
      Resv Lt Tamaki Seiichi玉置誠一10.06.44–11.44
      Resv Lt Kawahara Naoichi川原直市11.44–14.05.45
Yoshitomo Maru No. 12    第十二良友丸
   Builder: Matsuura Tekkosho
   Owner: Yoshio Tateshi  
   Call Sign: JLJJ  
   Official Number: 38818  
   Laid Down: 01.05.1933
   Launched: 01.01.1934
   Completed (209 GRT): 01.01.1934
   Requisitioned: 10.10.1941
   Service:  
      AM Div 32, Osaka Guard District 10.10.41–25.05.42
   Fate: Sunk 25.05.42  
   Removed from Navy List: 15.06.1942
   Commanding Officers:  
      Resv Lt (jg) Matsushima Iwahara松島岩平10.10.41–25.05.42
 

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Abbreviations and Terms used