Japanese Navy in 1940

List of active ships

Active ships at the end of the year

Pennant List (end of the year)

• Battleship
  • Kongo, Hiei, Haruna, Kirishima, Fuso, Yamashiro, Ise, Hyuga, Nagato, Mutsu
• Training battleship
  • -
• Aircraft carrier
  • Hosho, Akagi, Kaga, Ryujo, Soryu, Hiryu, Zuiho
• Cruiser
  • (1st class) Furutaka, Kako, Aoba, Kinugasa, Nachi, Myoko, Haguro, Ashigara, Takao, Atago, Maya, Chokai
  • (2nd class) Tenryu, Tatsuta, Kuma, Tama, Kitakami, Oi, Kiso, Nagara, Natori, Kinu, Isuzu, Yura, Yubari, Sendai, Abukuma, Naka, Jintsu, Mogami, Mikuma, Suzuya, Kumano, Tone, Chikuma
• Training cruiser
  • Katori, Kashima
• Coast Defense ship
  • Asama, Yakumo, Azuma, Izumo, Iwate, Kasuga, Shimushu, Kunashiri
• Gunboat
  • Toba, Saga, Ataka, Seta, Katata, Hira, Hozu, Atami, Futami, Fushimi, Sumida, Hashidate
• Submarine depot ship
  • Komahashi, Jingei, Chogei, Taigei, Tsurugisaki
• Minelayer
  • Tokiwa, Katsuriki, Itsukushima, Shirataka, Yaeyama, Okinoshima, Hatsutaka, Aotaka
• Seaplane tender
  • Notoro, Kamoi, Chitose, Chiyoda, Mizuho
• Destroyer
  • (1st class) Minekaze, Sawakaze, Okikaze, Yakaze, Hakaze, Shiokaze, Akikaze, Yukaze, Tachikaze, Hokaze, Nokaze, Namikaze, Numakaze, Kamikaze, Asakaze, Harukaze, Matsukaze, Hatakaze, Oite, Hayate, Asanagi, Yunagi, Mutsuki, Kisaragi, Yayoi, Uzuki, Satsuki, Minazuki, Fumizuki, Nagatsuki, Kikuzuki, Mikazuki, Mochizuki, Yuzuki, Fubuki, Shirayuki, Hatsuyuki, Murakumo, Shinonome, Usugumo, Shirakumo, Isonami, Uranami, Ayanami, Shikinami, Asagiri, Yugiri, Amagiri, Sagiri, Oboro, Akebono, Sazanami, Ushio, Akatsuki, Hibiki, Ikazuchi, Inazuma, Hatsuharu, Nenohi, Hatsushimo, Wakaba, Yugure, Ariake, Shiratsuyu, Shigure, Murasame, Yudachi, Samidare, Harusame, Yamakaze, Kawakaze, Umikaze, Suzukaze, Asashio, Oshio, Michishio, Arashio, Natsugumo, Yamagumo, Minegumo, Asagumo, Arare, Kasumi, Kagero, Shiranui, Kuroshio, Oyashio, Hayashio, Natsushio, Hatsukaze, Yukikaze, Amatsukaze, Tokitsukaze, Urakaze, Isokaze
  • (2nd class) Tsuga, Kuri, Hasu, Wakatake, Kuretake, Sanae, Asagao, Fuyo, Karukaya
• Submarine
  • (1st class) I-1, 2, 3, 4, 5, 6, 7, 8, 15, 16, 20, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 64, 65, 66, 68, 69, 70, 71, 72, 73, 74, 75, 121, 122, 123, 124
  • (2nd class) Ro-30, 31, 32, 33, 34, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68
• Minesweeper
  • W-1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18
• Torpedo boat
  • Chidori, Manazuru, Tomozuru, Hatsukari, Otori, Kasasagi, Hiyodori, Hayabusa, Hato, Sagi, Kari, Kiji
• Submarine chaser
  • CH-1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
• Repair ship
  • Asahi, Akashi
• Transport
  • (oiler) Shiretoko, Erimo, Sata, Tsurumi, Shiriya, Iro, Ondo, Naruto, Hayatomo
  • (collier) Muroto, Noshima
  • (supply ship) Mamiya
  • (ammunition ship) Kashino
  • (miscellaneous) Soya
• Icebreaker
  • Odomari
• Survey ship
  • -
• Training ship
  • Fuji, Shikishima
• Target ship
  • Settsu
• Minelayer craft
  • Toshima, Kuroshima, Ashisaki, Katoku, Ento, Kurokami, Katashima, Enoshima, Ninoshima, Kurosaki, Washizaki, Tsubame, Kamome, Natsushima, Nasami, Sarushima, Sokuten, Shirakami, Naryu, Kyosai, Ukishima, Hirashima
• Auxiliary Minesweeper
  • -
• Auxiliary submarine depot craft
  • -
• Patrol craft
  • PB-1, 2, 31, 32, 33, 34, 35, 36, 37, 38, 39, 46
• Auxiliary Submarine chaser
  • CHa-51, 52, 53
• Cablelayer craft
  • Hashima

Ships in and out

Commissioned ships in the year

• 20 Jan
  • Yukikaze, completed (FY1937, Destroyer first class)
• 27 Jan
  • Kuroshio, completed (FY1937, Destroyer first class)
• 15 Feb
  • Hatsukaze, completed (FY1937, Destroyer first class)
• 20 Feb
  • Soya, acquired (Transport, ex-merchantman Chiryo-Maru)
• 30 Mar
  • I-go dai 16 Sensuikan, completed (FY1937, Submarine first class)
• 20 Apr
  • Katori, completed (FY1938, Training cruiser)
• 31 May
  • Kashima, completed (FY1938, Training cruiser)
  • Sumida, completed (FY1937, Gunboat)
• 20 Jun
  • Naryu, completed (FY1937, Minelayer craft)
• 30 Jun
  • Aotaka, completed (FY1937, Minelayer)
  • Shimushu, completed (FY1937, Coast Defense ship)
  • Hashidate, completed (FY1937, Gunboat)
• 10 Jul
  • Kashino, completed (FY1937, Transport)
• 15 Jul
  • Dai 13 go Kusentei, completed (FY1939, Submarine chaser)
• 20 Aug
  • Oyashio, completed (FY1937, Destroyer first class)
• 21 Aug
  • Hayashio, completed (FY1937, Destroyer first class)
  • Natsushio, completed (FY1937, Destroyer first class)
• 26 Sept
  • I-go dai 20 Sensuikan, completed (FY1937, Submarine first class)
• 30 Sept
  • I-go dai 15 Sensuikan, completed (FY1937, Submarine first class)
• 3 Oct
  • Kunashiri, completed (FY1937, Coast Defense ship)
• 25 Oct
  • Hashima, reclassified from Harbor service (Cablelayer craft)
• 26 Oct
  • Amatsukaze, completed (FY1937, Destroyer first class)
• 31 Oct
  • Ukishima, completed (FY1937, Minelayer craft)
• 30 Nov
  • Isokaze, completed (FY1937, Destroyer first class)
• 15 Dec
  • Tokitsukaze, completed (FY1937, Destroyer first class)
  • Urakaze, completed (FY1937, Destroyer first class)
• 24 Dec
  • Hirashima, completed (FY1939, Minelayer craft)
• 27 Dec
  • Zuiho, completed (FY1934, Aircraft carrier)

Reclassified ships in the year

• 31 Jan
  • Hiei, Battleship from Training battleship
• 1 Apr
  • Shimakaze, Patrol craft from Destroyer first class, renamed as Dai 1 go Shokaitei
  • Nadakaze, Patrol craft from Destroyer first class, renamed as Dai 2 go Shokaitei
  • Kiku, Patrol craft from Destroyer second class, renamed as Dai 31 go Shokaitei
  • Aoi, Patrol craft from Destroyer second class, renamed as Dai 32 go Shokaitei
  • Hagi, Patrol craft from Destroyer second class, renamed as Dai 33 go Shokaitei
  • Fuji, Patrol craft from Destroyer second class, renamed as Dai 36 go Shokaitei
  • Susuki, Patrol craft from Destroyer second class, renamed as Dai 34 go Shokaitei
  • Hishi, Patrol craft from Destroyer second class, renamed as Dai 37 go Shokaitei
  • Tade, Patrol craft from Destroyer second class, renamed as Dai 39 go Shokaitei
  • Tsuta, Patrol craft from Destroyer second class, renamed as Dai 35 go Shokaitei
  • Yomogi, Patrol craft from Destroyer second class, renamed as Dai 38 go Shokaitei
  • Yugao, Patrol craft from Destroyer second class, renamed as Dai 46 go Shokaitei
• 15 Nov
  • Dai 51 go Kusentei, Auxiliary Submarine chaser from Submarine chaser, renamed as Dai 51 Kusen Tokumutei
  • Dai 52 go Kusentei, Auxiliary Submarine chaser from Submarine chaser, renamed as Dai 52 Kusen Tokumutei
  • Dai 53 go Kusentei, Auxiliary Submarine chaser from Submarine chaser, renamed as Dai 53 Kusen Tokumutei

Decommissioned ships in the year

• 1 Feb
  • Kaya, discarded (Destroyer second class)
  • Nashi, discarded (Destroyer second class)
  • Take, discarded (Destroyer second class)
  • Kaki, discarded (Destroyer second class)
  • Nire, discarded (Destroyer second class)
  • Sumire, discarded (Destroyer second class)
  • Ashi, discarded (Destroyer second class)
• 1 Apr
  • Yodo, discarded (Gunboat)
  • Yahagi, discarded (Cruiser second class)
  • Hirado, discarded (Cruiser second class)
  • I-go dai 51 Sensuikan, discarded (Submarine first class)
  • Ro-go dai 26 Sensuikan, discarded (Submarine second class)
  • Ro-go dai 27 Sensuikan, discarded (Submarine second class)
  • Ro-go dai 28 Sensuikan, discarded (Submarine second class)
  • Ro-go dai 53 Sensuikan, discarded (Submarine second class)
  • Ro-go dai 54 Sensuikan, discarded (Submarine second class)
  • Ro-go dai 55 Sensuikan, discarded (Submarine second class)
  • Ro-go dai 56 Sensuikan, discarded (Submarine second class)
  • Koshu, discarded (Survey ship)
  • Sunosaki, discarded (Transport)
• 1 May
  • Momo, discarded (Destroyer second class)
  • Hinoki, discarded (Destroyer second class)
  • Yanagi, discarded (Destroyer second class)
• 1 Jun
  • I-go dai 63 Sensuikan, discarded (lost 2 Feb 1939, Submarine first class)
• 1 Nov
  • I-go dai 67 Sensuikan, discarded (lost 29 Aug 1940, Submarine first class)

Fleet organization

as of 1 May

Combined Fleet 聯合艦隊	First Fleet 第一艦隊	1st Squadron 第一戦隊 Nagato 長門, Mutsu 陸奥, Ise 伊勢, Yamashiro 山城 3rd Squadron 第三戦隊 Kongo 金剛, Haruna 榛名 6th Squadron 第六戦隊 Kako 加古, Furutaka 古鷹 1st Torpedo Squadron 第一水雷戦隊 Abukuma 阿武隈 2nd Destroyer Unit 第二駆逐隊 Murasame 村雨, Yudachi 夕立, Harusame 春雨, Samidare 五月雨 24th Destroyer Unit 第二十四駆逐隊 Umikaze 海風, Yamakaze 山風, Kawakaze 江風, Suzukaze 涼風 27th Destroyer Unit 第二十七駆逐隊 Ariake 有明, Yugure 夕暮, Shiratsuyu 白露, Shigure 時雨 3rd Torpedo Squadron 第三水雷戦隊 Sendai 川内 12th Destroyer Unit 第十二駆逐隊 Murakumo 叢雲, Shinonome 東雲, Usugumo 薄雲, Shirakumo 白雲 20th Destroyer Unit 第二十駆逐隊 Amagiri 天霧, Asagiri 朝霧, Yugiri 夕霧 4th Submarine Squadron 第四潜水戦隊 Tsurugisaki 剣埼 18th Submarine Unit 第十八潜水隊 Submarine I-53 伊号第53, I-54 第54, I-55 第55潜水艦 19th Submarine Unit 第十九潜水隊 Submarine I-56 伊号第56, I-57 第57, I-58 第58潜水艦 30th Submarine Unit 第三十潜水隊 Submarine I-67 伊号第67, I-65 第65, I-66 第66潜水艦 Submarine I-7 伊号第7潜水艦 1st Air Squadron 第一航空戦隊 Akagi 赤城, Ryujo 龍驤 19th Destroyer Unit 第十九駆逐隊 Uranami 浦波, Ayanami 綾波, Isonami 磯波, Shikinami 敷波
	Second Fleet 第二艦隊	4th Squadron 第四戦隊 Takao 高雄, Atago 愛宕, Maya 摩耶 5th Squadron 第五戦隊 Nachi 那智, Haguro 羽黒 7th Squadron 第七戦隊 Mogami 最上, Suzuya 鈴谷, Kumano 熊野, Mikuma 三隈 8th Squadron 第八戦隊 Tone 利根, Chikuma 筑摩 2nd Torpedo Squadron 第二水雷戦隊 Jintsu 神通 8th Destroyer Unit 第八駆逐隊 Asashio 朝潮, Oshio 大潮, Michishio 満潮, Arashio 荒潮 16th Destroyer Unit 第十六駆逐隊 Hatsukaze 初風, Yukikaze 雪風, Kuroshio 黒潮 18th Destroyer Unit 第十八駆逐隊 Kasumi 霞, Arare 霰, Kagero 陽炎, Shiranui 不知火 4th Torpedo Squadron 第四水雷戦隊 Naka 那珂 6th Destroyer Unit 第六駆逐隊 Ikazuchi 雷, Inazuma 電, Hibiki 響, Akatsuki 曉 7th Destroyer Unit 第七駆逐隊 Akebono 曙, Oboro 朧, Ushio 潮, Sazanami 漣 3rd Submarine Squadron 第三潜水戦隊 Isuzu 五十鈴 11th Submarine Unit 第十一潜水隊 Submarine I-74 伊号第74, I-75 第75潜水艦 12th Submarine Unit 第十二潜水隊 Submarine I-68 伊号第68, I-69 第69, I-70 第70潜水艦 20th Submarine Unit 第二十潜水隊 Submarine I-71 伊号第71, I-72 第72, I-73 第73潜水艦 Submarine I-8 伊号第8潜水艦 2nd Air Squadron 第二航空戦隊 Hiryu 飛龍, Soryu 蒼龍 11th Destroyer Unit 第十一駆逐隊 Hatsuyuki 初雪, Shirayuki 白雪, Fubuki 吹雪
		1st Air Unit Group 第一聯合航空隊 Kanoya Naval Air Unit 鹿屋航空隊 Takao Naval Air Unit 高雄航空隊 Okikaze 沖風, Minekaze 峯風
	Supplement 付属	Naruto 鳴戸, Mamiya 間宮, Akashi 明石, Settsu 攝津, Yakaze 矢風
Fourth Fleet 第四艦隊		17th Squadron 第十七戦隊 Chitose 千歳, Kamoi 神威 18th Squadron 第十八戦隊 Tama 多摩, Tokiwa 常磐 5th Submarine Squadron 第五潜水戦隊 Yura 由良 9th Submarine Unit 第九潜水隊 Submarine I-123 伊号第123, I-124 第124潜水艦 13th Submarine Unit 第十三潜水隊 Submarine I-121 伊号第121, I-122 第122潜水艦 21st Submarine Unit 第二十一潜水隊 Submarine Ro-33 呂号第33, Ro-34 第34潜水艦 30th Destroyer Unit 第三十駆逐隊 Mutsuki 睦月, Mochizuki 望月 Yokohama Naval Air Unit 横浜航空隊 Notoro 能登呂

1 Jun

Training Fleet 練習艦隊

Katori 香取, Kashima 鹿島

as of 15 Nov

Combined Fleet 聯合艦隊	First Fleet 第一艦隊	1st Squadron 第一戦隊 Nagato 長門, Mutsu 陸奥 2nd Squadron 第二戦隊 Ise 伊勢, Hyuga 日向 3rd Squadron 第三戦隊 Kongo 金剛, Haruna 榛名 6th Squadron 第六戦隊 Kako 加古, Furutaka 古鷹 1st Torpedo Squadron 第一水雷戦隊 Abukuma 阿武隈 6th Destroyer Unit 第六駆逐隊 Ikazuchi 雷, Inazuma 電, Akatsuki 曉, Hibiki 響 7th Destroyer Unit 第七駆逐隊 Akebono 曙, Ushio 潮, Sazanami 漣 21st Destroyer Unit 第二十一駆逐隊 Hatsuharu 初春, Nenohi 子日, Hatsushimo 初霜, Wakaba 若葉 27th Destroyer Unit 第二十七駆逐隊 Ariake 有明, Yugure 夕暮, Shiratsuyu 白露, Shigure 時雨 3rd Torpedo Squadron 第三水雷戦隊 Sendai 川内 11th Destroyer Unit 第十一駆逐隊 Hatsuyuki 初雪, Fubuki 吹雪, Shirayuki 白雪 12th Destroyer Unit 第十二駆逐隊 Shinonome 東雲, Murakumo 叢雲, Shirakumo 白雲 19th Destroyer Unit 第十九駆逐隊 Isonami 磯波, Uranami 浦波, Shikinami 敷波, Ayanami 綾波 20th Destroyer Unit 第二十駆逐隊 Asagiri 朝霧, Yugiri 夕霧, Amagiri 天霧, Sagiri 狭霧 3rd Air Squadron 第三航空戦隊 Ryujo 龍驤, Hosho 鳳翔 34th Destroyer Unit 第三十四駆逐隊 Hakaze 羽風, Akikaze 秋風, Tachikaze 太刀風 7th Air Squadron 第七航空戦隊 Mizuho 瑞穂, Chitose 千歳
	Second Fleet 第二艦隊	4th Squadron 第四戦隊 Takao 高雄, Atago 愛宕, Chokai 鳥海, Maya 摩耶 5th Squadron 第五戦隊 Nachi 那智, Haguro 羽黒 7th Squadron 第七戦隊 Kumano 熊野, Suzuya 鈴谷, Mikuma 三隈, Mogami 最上 8th Squadron 第八戦隊 Tone 利根, Chikuma 筑摩 2nd Torpedo Squadron 第二水雷戦隊 Jintsu 神通 8th Destroyer Unit 第八駆逐隊 Oshio 大潮, Michishio 満潮, Arashio 荒潮, Asashio 朝潮 15th Destroyer Unit 第十五駆逐隊 Natsushio 夏潮, Kuroshio 黒潮, Oyashio 親潮, Hayashio 早潮 16th Destroyer Unit 第十六駆逐隊 Yukikaze 雪風, Hatsukaze 初風, Amatsukaze 天津風 18th Destroyer Unit 第十八駆逐隊 Arare 霰, Kasumi 霞, Kagero 陽炎, Shiranui 不知火 4th Torpedo Squadron 第四水雷戦隊 Naka 那珂 2nd Destroyer Unit 第二駆逐隊 Murasame 村雨, Yudachi 夕立, Samidare 五月雨, Harusame 春雨 9th Destroyer Unit 第九駆逐隊 Asagumo 朝雲, Yamagumo 山雲, Natsugumo 夏雲, Minegumo 峯雲 24th Destroyer Unit 第二十四駆逐隊 Umikaze 海風, Yamakaze 山風, Kawakaze 江風, Suzukaze 涼風 1st Air Squadron 第一航空戦隊 Kaga 加賀 3rd Destroyer Unit 第三駆逐隊 Shiokaze 汐風, Hokaze 帆風 2nd Air Squadron 第二航空戦隊 Hiryu 飛龍, Soryu 蒼龍 23rd Destroyer Unit 第二十三駆逐隊 Kikuzuki 菊月, Mikazuki 三日月, Mochizuki 望月, Yuzuki 夕月 1st Base Force 第一根拠地隊 First Harbor Service Center 第一港務部 1st Defense Unit 第一防備隊 1st Gunboat Unit 第一砲艦隊 1st Signal Unit 第一通信隊
	Fourth Fleet 第四艦隊	18th Squadron 第十八戦隊 Kashima 鹿島, Tenryu 天龍, Tatsuta 龍田 19th Squadron 第十九戦隊 Okinoshima 沖島, Tokiwa 常磐 6th Torpedo Squadron 第六水雷戦隊 Yubari 夕張 29th Destroyer Unit 第二十九駆逐隊 Oite 追風, Hayate 疾風 30th Destroyer Unit 第三十駆逐隊 Mutsuki 睦月, Kisaragi 如月, Yayoi 彌生, Uzuki 卯月 3rd Base Force 第三根拠地隊 Fukuyama-maru 福山丸 55th Submarine chaser Unit 第五十五駆潜隊 3rd Defense Unit 第三防備隊 7th Naval Air Unit 第七航空隊 4th Gunboat Unit 第四砲艦隊 5th Base Force 第五根拠地隊 Shoei-maru 勝泳丸 4th Defense Unit 第四防備隊 5th Defense Unit 第五防備隊 8th Gunboat Unit 第八砲艦隊 8th Naval Air Unit 第八航空隊 5th Signal Unit 第五通信隊 Fourth Meteorologic Center 第四気象部
	Sixth Fleet 第六艦隊	1st Submarine Squadron 第一潜水戦隊 Katori 香取, Taigei 大鯨 1st Submarine Unit 第一潜水隊 Submarine I-15 伊号第15, I-16 第16, I-17 第17潜水艦 Submarine I-20 伊号第20潜水艦 2nd Submarine Squadron 第二潜水戦隊 Chogei 長鯨 7th Submarine Unit 第七潜水隊 Submarine I-1 伊号第1, I-2 第2, I-3 第3潜水艦 8th Submarine Unit 第八潜水隊 Submarine I-4 伊号第4, I-5 第5, I-6 第6潜水艦 Submarine I-7 伊号第7潜水艦 3rd Submarine Squadron 第三潜水戦隊 Isuzu 五十鈴 11th Submarine Unit 第十一潜水隊 Submarine I-74 伊号第74, I-75 第75潜水艦 12th Submarine Unit 第十二潜水隊 Submarine I-68 伊号第68, I-69 第69, I-70 第70潜水艦 20th Submarine Unit 第二十潜水隊 Submarine I-71 伊号第71, I-72 第72, I-73 第73潜水艦 Submarine I-8 伊号第8潜水艦
		17th Squadron 第十七戦隊 Itsukushima 厳島, Yaeyama 八重山 5th Torpedo Squadron 第五水雷戦隊 Natori 名取 5th Destroyer Unit 第五駆逐隊 Harukaze 春風, Hatakaze 旗風, Asakaze 朝風, Matsukaze 松風 22nd Destroyer Unit 第二十二駆逐隊 Satsuki 皐月, Minazuki 水無月, Fumizuki 文月, Nagatsuki 長月 4th Submarine Squadron 第四潜水戦隊 Kitakami 北上 18th Submarine Unit 第十八潜水隊 Submarine I-53 伊号第53, I-54 第54, I-55 第55潜水艦 19th Submarine Unit 第十九潜水隊 Submarine I-56 伊号第56, I-57 第57, I-58 第58潜水艦 21st Submarine Unit 第二十一潜水隊 Submarine Ro-33 呂号第33, Ro-34 第34潜水艦 5th Submarine Squadron 第五潜水戦隊 Yura 由良 28th Submarine Unit 第二十八潜水隊 Submarine I-59 伊号第59, I-60 第60潜水艦 29th Submarine Unit 第二十九潜水隊 Submarine I-61 伊号第61, I-62 第62, I-64 第64潜水艦 30th Submarine Unit 第三十潜水隊 Submarine I-65 伊号第65, I-66 第66潜水艦 6th Air Squadron 第六航空戦隊 Notoro 能登呂, Kamikawa-maru 神川丸 1st Air Unit Group 第一聯合航空隊 Takao Naval Air Unit 高雄航空隊 Kanoya Naval Air Unit 鹿屋航空隊 Toko Naval Air Unit 東港航空隊 Minekaze 峯風 2nd Air Unit Group 第二聯合航空隊 Bihoro Naval Air Unit 美幌航空隊 Wonsan Naval Air Unit 元山航空隊 Okikaze 沖風 4th Air Unit Group 第四聯合航空隊 Chitose Naval Air Unit 千歳航空隊 Yokohama Naval Air Unit 横浜航空隊 Kamoi 神威
	Supplement 付属	Chiyoda 千代田 Yakaze 矢風 Settsu 攝津, Akashi 明石, Asahi 朝日, Muroto 室戸 Asahi-maru 朝日丸, Rio-de-Janeiro-maru りおでじやねろ丸
China Area Fleet 支那方面艦隊		Shanghai Standing Land Force 上海特別陸戦隊 Shanghai Area Base Force 上海方面根拠地隊 1st Minesweeper Unit 第一掃海隊 13th Gunboat Unit 第十三砲艦隊 14th Gunboat Unit 第十四砲艦隊 1st Inland Gunboat Unit 第一砲艇隊 2nd Inland Gunboat Unit 第二砲艇隊 Shanghai Harbor Service Center 上海港務部 Zhoushan Island Base Unit 舟山島基地隊
	First China Expeditionary Fleet 第一遣支艦隊	Ataka 安宅, Seta 勢多, Katata 堅田, Hira 比良, Hozu 保津, Atami 熱海, Futami 二見, Fushimi 伏見, Sumida 隅田 Hankow Area Standing Base Force 漢口方面特別根拠地隊 Nanking Base Unit 南京基地隊 Jiujiang Base Unit 九江基地隊
	Second China Expeditionary Fleet 第二遣支艦隊	15th Squadron 第十五戦隊 Hashidate 橋立, Saga 嵯峨 Hiyodori 鵯, Kasasagi 鵲 Kwangtung Area Standing Base Force 広東方面特別根拠地隊 Xiamen Area Standing Base Force 廈門方面特別根拠地隊 Kainan Base Force 海南島根拠地隊 15th Defense Unit 第十五防備隊 16th Defense Unit 第十六防備隊 14th Naval Air Unit 第十四航空隊
	Third China Expeditionary Fleet 第三遣支艦隊	12th Squadron 第十二戦隊 Iwate 磐手 11th Torpedo Unit 第十一水雷隊 Sagi 鷺, Kiji 雉, Hato 鳩, Kari 雁 Tsingtao Area Standing Base Force 青島方面特別根拠地隊 Supplement 付属 Shuri-maru 首里丸

Who's who

Key job assignment

	1 Jan	16 Jan	22 Jul	5 Sep	1 Oct
Emperor of Japan	Emperor Showa
Prime Minister	Gen Abe Nobuyuki	Adm Yonai Mitsumasa	Duke Konoe Fumimaro
Minister of Navy	VAdm Yoshida Zengo			Adm Oikawa Koshiro
Vice Minister of Navy	VAdm Sumiyama Tokutaro			VAdm Toyoda Teijiro
Director, Naval Shipping Command	VAdm Toyoda Soemu
Director, Naval Aviation Command	VAdm Toyoda Teijiro				VAdm Inoue Shigeyoshi
Chief, Naval General Staff	AF Prince Hiroyasu
Vice Chief, Naval General Staff	VAdm Kondo Nobutake
Commander-in-chief, Combined Fleet Commander-in-chief, First Fleet	VAdm Yamamoto Isoroku
Commander-in-chief, Second Fleet	VAdm Koga Mineichi

Active full admirals

1. Prince Hiroyasu 博恭王 (Admiral of the Fleet)
2. Osumi Mineo 大角岑生
3. Nagano Osami 永野修身
4. Yonai Mitsumasa 米内光政 (16 Jan 1940 reserve)
5. Hyakutake Gengo 百武源吾
6. Kato Takayoshi 加藤隆義
7. Hasegawa Kiyoshi 長谷川清
8. Oikawa Koshiro 及川古志郎
9. Shiozawa Koichi 塩沢幸一
10. Yamamoto Isoroku 山本五十六 (15 Nov 1940 promotion)
11. Shimada Shigetaro 嶋田繁太郎 (15 Nov 1940 promotion)
12. Yoshida Zengo 吉田善吾 (15 Nov 1940 promotion)

Chronology for Japanese Navy
1850	1851	1852	1853	1854	1855	1856	1857	1858	1859
1860	1861	1862	1863	1864	1865	1866	1867	1868	1869
1870	1871	1872	1873	1874	1875	1876	1877	1878	1879
1880	1881	1882	1883	1884	1885	1886	1887	1888	1889
1890	1891	1892	1893	1894	1895	1896	1897	1898	1899
1900	1901	1902	1903	1904	1905	1906	1907	1908	1909
1910	1911	1912	1913	1914	1915	1916	1917	1918	1919
1920	1921	1922	1923	1924	1925	1926	1927	1928	1929
1930	1931	1932	1933	1934	1935	1936	1937	1938	1939
1940	1941	1942	1943	1944	1945	1946	1947	1948	1949
1950	1951	1952	1953	1954	1955	1956	1957	1958	1959
1960	1961	1962	1963	1964	1965	1966	1967	1968	1969
1970	1971	1972	1973	1974	1975	1976	1977	1978	1979
1980	1981	1982	1983	1984	1985	1986	1987	1988	1989
1990	1991	1992	1993	1994	1995	1996	1997	1998	1999
2000	2001	2002	2003	2004	2005	2006	2007	2008	2009
2010	2011	2012	2013	2014	2015	2016	2017	2018	2019
2020	2021	2022	2023	2024	2025	2026	2027	2028	2029