Home Page World War II Armed Forces — Orders of Battle and Organizations Last Updated 29.04.2005
Imperial Japanese Navy
Commanders of Base Forces
In cooperation with Jeff Donahoo
The format for names is Japanese style: rank; last name, first name; (if known, Japanese Naval Academy at Etajima class), note that traditionally it indicated the imperial year, which was based on the mythical founding of Japan by Emperor Jimmu in 660 BC.
Dates are given thus: day.month.year
Commanders marked with * are known to have died.
 

Base Force 1
    base: Takao, Taiwan 12.41 – 04.42
    base: Buin, Bougainville, Solomon ISlands 04.42 –
    under: 3rd Fleet 12.41 – 04.42
    under: 1st Southern Expeditionary Fleet 04.42 –
      • R.Adm Kubo Kyuji (38) 11.41 – 02.42
      • R.Adm Itagaki Sakan (39) 10.42 – 11.43
      • R.Adm Takeda Isamu (43) 11.43 – 09.45

Base Force 2
    base: Takao, Taiwan 12.41 –
    base: Wewak, New Guinea – 03.44
    under: 3rd Fleet 12.41 –
      • R.Adm Hirose Sueto (39) 11.41 – 03.42
      • R.Adm Kamata Michiaki (39) 12.42 – 02.44
      • R.Adm Ogata Masaki (41) 12.43 – 03.44
    deactivated 03.44

Base Force 3
    base: Palau, West Carolines
    under: 4th Fleet
      • R.Adm Takeda Moriji (38) 03.42 – 06.42
    deactivated 06.42

3rd Special Base Force
    activated: 15.02.43
    base: Tarawa, Gilberts
      • R.Adm Tomonari Saichiro (38) 02.43 – 07.43
      • *R.Adm Shibazaki Keiji (43) 07.43 – 11.43
    deactivated: 11.43

Base Force 4
    base: Truk, East Carolines
    under: 4th Fleet
      • R.Adm Takeda Moriji (38) 06.42 – 07.43
      • R.Adm Arima Kaoru (42) 02.44 – 05.44

Base Force 5
    base: Saipan, Marianas
    under: 4th Fleet
      • V.Adm Moizumi Shinichi (37) 11.41 – 06.42
      • R.Adm Kasuga Atsushi (37) 04.42 – 09.42
      • R.Adm Tomonari Saichiro (38) 09.42 – 02.43
      • R.Adm Fukuzawa Tsunekichi (41) 02.43 – 10.43
      • R.Adm Tsujimura Takehisa (42) 10.43 – 07.44
    deactivated: 08.44

Base Force 6
    base: Kwajalein, Marshalls
    under: 4th Fleet
      • *R.Adm Yatsushiro Sukeyoshi (11/41 – 02.42
      • R.Adm Abe Koso (40) 02.42 – 11.43
      • *R.Adm Akiyama Monzo (42) 11.43 – 02.44
    deactivated: 02.44

Base Force 7
    base: Ominato, Japan
    base: Lae, New Guinea
    under: 5th Fleet 12.41 – 07.42
    under: 8th Fleet 07.42 –
      • R.Adm Okano Ikkan (36) 11.41 – 04.42
      • R.Adm Fujimori Seiichiro (37) 04.42 – 06.42
      •
      • R.Adm Mori Kunizo (40) 09.43 – 10.43
      • R.Adm Kudo Kyuachi (39) 10.43 – 03.44
    deactivated: 03.44

Base Force 8
    activated: 07.42
    base: Rabaul, New Britain, Bismarks
    under: 8th Fleet
      • R.Adm Kanazawa Masao (39) 07.42 – 11.42
      • R.Adm Tokunaga Sakae (41) 11.42 – 11.43
      • V.Adm Irifune Naosaburo (39) 11.43 – 12.44

Base Force 9
    base: Sabang, Sumatra, Indonesia
    under: 1st Southern Expeditionary Fleet
      • V.Adm Hiraoka Kumeichi (39) 11.41 – 02.44
      • V.Adm Hirose Sueto (39) 03.44 – 09.45

Special Base Force 10
    base: Singapore, Malaya
      • V.Adm Oku Nobukazu (38) 01.42 – 12.42
      • R.Adm Yamaguchi Gisaburo (40) 12.42 – 11.43
      • V.Adm Imamura Osamu (40) 11.43 – 09.45

Special Base Force 11
    base: Saigon, Indochina
    under: Southern Fleet 12.41 – 01.42
    under: 1st Southern Expeditionary Fleet 01.42 –
      • V.Adm Takasu Sanjiro (37) 11.41 – 11.42
      • V.Adm Horiuchi Shigenori (39) 11.42 – 09.43
      • V.Adm Fujita Risaburo (40) 09.43 – 01.45
      • R.Adm V.Adm Kondo Yasuichiro (42) 01.45 – 09.45

Special Base Force 12
    base: Port Blair, Andamans
    under: 1st Southern Expeditionary Fleet
      • R.Adm Ishikawa Shigeru (40) 02.42 – 06.44
      • R.Adm Hara Teizo (41) 06.44 – 09.45

Base Force 13
    base: Rangoon, Burma
      • V.Adm Tanaka Raizo (41) 10.43 – 09.45

Base Force 14
   New Ireland, Bismarks
      • R.Adm Ota Minoru (41) 12.43 – 02.44
      • R.Adm Tamura Ryukichi (41) 02.44 – 09.45

Special Base Force 15
    base: Prai, Malaya
      • R.Adm Ichioka Hisashi (42) 06.44 – 08.44
      • R.Adm Uozumi Jisaku (42) 08.44 – 09.45

Special Base Force 21
    base: Surabaya, Java, Indonesia
    under: 2nd Southern Expeditionary Fleet
      • R.Adm Kubo Kyuji (38) 03.42 – 09.42
      • V.Adm Goga Keijiro (38) 09.42 – 09.43
      • R.Adm Hoshino Masatsugu (41) 09.43 – 11.44
      • R.Adm Tanaka Kikumatsu (43) 11.44 – 09.45

Special Base Force 22
    base: Balikpapan, Borneo, Indonesia
    under: 2nd Southern Expeditionary Fleet
      • R.Adm Hirose Sueto (39) 03.42 – 10.42
      • V.Adm Fukuda Ryozo (38) 10.42 – 11.43
      • R.Adm Daigo Tadashige (40) 11.43 – 08.44
      • R.Adm Kamata Michiaki (39) 08.44 – 09.45

Base Force 23
    base: Makassar, Celebes, Indonesia
    under: 2nd Southern Expeditionary Fleet
      • R.Adm Mori Kunizo (40) 03.42 – 11.42
      • R.Adm Osugi Morikazu (41) 01.44 – 09.45

Special Base Force 24
    base: Ambon, Amboina, Indonesia
    under: 2nd Southern Expeditionary Fleet
      • R.Adm Hatakeyama Koichiro (39) 02.42 – 03.43
      • R.Adm Shibata Yaichiro (40) 03.43 – 02.44
      • R.Adm Fukuda Teizaburo (40) 02.44 – 09.44

Special Base Force 25
      • R.Adm Suzuki Chozo (40) 12.42 – 01.44
      • R.Adm Hase Shinzaburo (44) 01.44 – 01.45
      • R.Adm Okada Tametsugu (45) 03.45 – 06.45
      • V.Adm Ichise Shinichi (41) 05.45 – 09.45

Base Force 26
    Kau
      • R.Adm Yokokawa Ichihei (43) 11.43 – 05.44
      • V.Adm Ichise Shinichi (41) 05.44 – 05.45

Base Force 27
    base: Wewak, New Guinea
    under: 9th Fleet
      • R.Adm Sato Shiro (43) 03.44 – 09.45

Base Force 28
    base: Biak, New Guinea
    under: 9th Fleet
      • *R.Adm Senda Sadatoshi (40) 05.44 – 12.44

Base Force 30
    base: Palau, West Carolines
      • V.Adm Ito Kenzo (41) 01.44 – 09.45

Special Base Force 31
    base: Manila, Luzon, Philippines
    under 3rd Southern Expeditionary Fleet
      • V.Adm Kobayashi Tetsuri (38) 01.42 – 02.43
      • R.Adm Arima Kaoru (42) 09.44 – 11.44
      • *R.Adm Iwabuchi Sanji (43) 11.44 – 02.45

Special Base Force 32
    base: Takao, Tainwan 12.41
    base: Davao, Mindanao, Philippines 01.42 –
    under: 3rd Fleet 12.41
    under 3rd Southern Expeditionary Fleet 01.42 –
      • R.Adm Irifune Naosaburo (39) 11.41 – 03.43
      • R.Adm Shiroya Kiyoshi (40) 03.43 – 10.44
      • R.Adm Doi Naoji (43) 10.44 – 09.45

Special Base Force 33
    Cebu, Cebu, Philippines
      • R.Adm Harada Kaku (41) 08.44 – 09.45

Base Force 51
      • R.Adm Akiyama Katsuzo (40) 09.42 – 08.43

Base Force 53
      • R.Adm Mizui Seiji (40) 05.43 – 01.44

Chashima Base Force
      • R.Adm Kubo Kyuji (38) 01.44 – 06.45

Chichi Jima Base Force
    base: Ominato, Japan
    under: 5th Fleet
      • R.Adm Fujimori Seiichiro (37) 06.42 – 11.42
      • V.Adm Mori kunizo (40) 02.44 – 09.45

Hong Kong Base Force
    base: Hong Kong
    under: 2nd China Fleet
      • R.Adm Yasuba Yasuo (42) 03.42 – 09.42
      • R.Adm Okuma Jyo (44) 10.43 – 09.45

Rashin Base Force
    base: Rashin, Japan
      • R.Adm Sukigara Tamazo (37) 11.41 – 06.42
      • R.Adm Doi Naoji (43) 06.42 – 10.42

Ryujun Base Force
      • V.Adm Ukita Hidehiko (37) 11.41 – 01.42
      • R.Adm Nakamura Shigekazu (37) 01.42 – 11.42
      • V.Adm Hara Kenzaburo (37) 11.42 – 01.44
      • R.Adm Yamaguchi Gisaburo (40) 01.44 – 04.45
      • R.Adm Kobayoshi Kengo (42) 04.45 – 09.45

Saiki Base Force

Seito Base Force
      • Capt Osugi Morikazu (41) 12.41 – 04.42
      • V.Adm Kuwabara Torao (37) 04.42 – 11.43

Shanghai Base Force
      • V.Adm Makita Kakusaburo (38) 11.41 – 02.42
      • R.Adm Ono Ichiro (38) 02.42 – 06.43
      • R.Adm Suzuki Chozo (40) 03.44 – 08.44
      • R.Adm Mori Tokuji (40) 08.44 – 09.45

Yokosuka Base Force
      • R.Adm Harada Kaku (41) 12.43 – 08.44
      • R.Adm Sawada Torao (41) 11.44 – 09.45
 
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