| Cabinet Name: | Koiso Cabinet |
| Predecessor: | Tōjō Cabinet |
| Legislature Term: | 85th-86th Imperial Diet |
| Legislature Status: | Majority (coalition) |
| Political Party: | Imperial Rule Assistance Association (Taisei Yokusankai) Dai Nippon Seijikai (from March 30, 1945) Independent Military |
| State Head: | Shōwa |
| Cabinet Number: | 41st |
| Jurisdiction: | Japan |
| Flag Border: | true |
| Date Formed: | July 22, 1944 |
| Date Dissolved: | April 7, 1945 |
| Government Head Title: | Prime Minister |
| Government Head: | Kuniaki Koiso |
| State Head Title: | Emperor |
| Successor: | Kantarō Suzuki Cabinet |
The Koiso Cabinet is the 41st Cabinet of Japan led by Kuniaki Koiso from July 22, 1944 to April 7, 1945.
| Ministers | ||||||
|---|---|---|---|---|---|---|
| Portfolio | Name | Political party | Term start | Term end | ||
| Prime Minister | Kuniaki Koiso | Taisei Yokusankai | July 22, 1944 | April 7, 1945 | ||
| Minister for Foreign Affairs | Mamoru Shigemitsu | Independent | July 22, 1944 | April 7, 1945 | ||
| Minister of Home Affairs | Shigeo Ōdachi | Independent | July 22, 1944 | April 7, 1945 | ||
| Minister of Finance | Ishiwata Sōtarō | Taisei Yokusankai | July 22, 1944 | February 21, 1945 | ||
| Juichi Tsushima | Independent | February 21, 1945 | April 7, 1945 | |||
| Minister of the Army | Hajime Sugiyama | Military (Army) | July 22, 1944 | April 7, 1945 | ||
| Minister of the Navy | Mitsumasa Yonai | Military (Navy) | July 22, 1944 | April 7, 1945 | ||
| Minister of Justice | Matsuzaka Hiromasa | Independent | July 22, 1944 | April 7, 1945 | ||
| Minister of Education | Ninomiya Harushige | Military (Army) | July 22, 1944 | February 10, 1945 | ||
| Hideo Kodama | Dai Nippon Seijikai | February 10, 1945 | April 7, 1945 | |||
| Minister of Health | Hirose Hisatada | Taisei Yokusankai | July 22, 1944 | February 10, 1945 | ||
| Aikawa Katsuroku | Independent | February 10, 1945 | April 7, 1945 | |||
| Minister of Greater East Asia | Mamoru Shigemitsu | Independent | July 22, 1944 | April 7, 1945 | ||
| Minister of Agriculture and Commerce | Toshio Shimada | Dai Nippon Seijikai | July 22, 1944 | April 7, 1945 | ||
| Minister of Munitions | Ginjirō Fujiwara | Independent | July 22, 1944 | December 19, 1944 | ||
| Shigeru Yoshida | Independent | December 19, 1944 | April 7, 1945 | |||
| Minister of Transportation and Communications | Yonezō Maeda | Dai Nippon Seijikai | July 22, 1944 | April 7, 1945 | ||
| Minister of State | Machida Chūji | Dai Nippon Seijikai | July 22, 1944 | April 7, 1945 | ||
| Minister of State | Hideo Kodama | Taisei Yokusankai | July 22, 1944 | February 10, 1945 | ||
| Minister of State | Hirose Hisatada | Taisei Yokusankai | February 10, 1945 | February 21, 1945 | ||
| Minister of State | Ishiwata Sōtarō | Dai Nippon Seijikai | February 21, 1945 | April 7, 1945 | ||
| Minister of State | Taketora Ogata | Independent | July 22, 1944 | April 7, 1945 | ||
| Minister of State | Seizō Kobayashi | Taisei Yokusankai | July 22, 1944 | April 7, 1945 | ||
| Chief Cabinet Secretary | Miura Kunio | Independent | July 22, 1944 | July 29, 1944 | ||
| Tanaka Takeo | Independent | July 29, 1944 | February 10, 1945 | |||
| Hirose Hisatada | Taisei Yokusankai | February 10, 1945 | February 21, 1945 | |||
| Ishiwata Sōtarō | Dai Nippon Seijikai | February 21, 1945 | April 7, 1945 | |||
| Director-General of the Cabinet Legislation Bureau | Miura Kunio | Independent | July 22, 1944 | April 7, 1945 | ||
| Parliamentary Vice-Ministers | ||||||
| Portfolio | Name | Political party | Term start | Term end | ||
| Parliamentary Vice-Minister for Foreign Affairs | Matsuda Masayuki | Independent | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Vice-Minister of Home Affairs | Takechi Yūki | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Vice-Minister of Finance | Ogasawara Sankurō | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Vice-Minister of the Army | Ōshima Rikutarō | Independent | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Vice-Minister of the Navy | Kishida Masaki | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Vice-Minister of Justice | Nakai Kazuo | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Vice-Minister of Education | Imai Takehiko | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Vice-Minister of Health | Nakaigawa Hiroshi | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Vice-Minister of Greater East Asia | Shinohara Rokurō | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Vice-Minister of Agriculture and Commerce | Oyama Kuranosuke | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Vice-Minister of Munitions | Matsumura Kōzō | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Vice-Minister of Transport and Communications | Maeda Fusanosuke | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Undersecretaries | ||||||
| Portfolio | Name | Political party | Term start | Term end | ||
| Parliamentary Undersecretary for Foreign Affairs | Morishita Kunio | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Undersecretary of Home Affairs | Satō Yōnosuke | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Undersecretary of Finance | Tamura Hidekichi | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Undersecretary of the Army | Yorimitsu Yoshiaki | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Undersecretary of the Navy | Nakano Toshio | Independent | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Undersecretary of Justice | Tokugawa Muneyoshi | Independent | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Undersecretary of Education | Mishima Michiharu | Independent | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Undersecretary of Health | Motoharu Baba | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Undersecretary of Greater East Asia | Nakanishi Toshikazu | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Undersecretary of Agriculture and Commerce | Nagano Kōichi | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Undersecretary of Munitions | Nakamura Umekichi | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Parliamentary Undersecretary of Transport and Communications | Nanjō Tokuo | Dai Nippon Seijikai | September 1, 1944 | April 7, 1945 | ||
| Source:[1] | ||||||