Official Belligerents:
Japanese Empire
大日本帝國
Existed since: 3 January, 1868
Joined the war on: 18 September, 1931
Kingdom of Thailand
ราชอาณาจักรไทย
Existed since: 6 April, 1782
Joined the war on: 25 January, 1942
Japanese Puppet States in China:
Northeast Supreme Administrative Council
東北最高行政委員會
Was estabilished on: 16 February, 1932
Empire of (Great) Manchuria
(大)滿洲帝國
Was estabilished on: 1 March, 1932
East Hebei Autonomous Government
冀東防共自治政府
Was estabilished on: 25 November, 1935
Mongol Military Government
蒙古軍政府
Was estabilished on: 12 May, 1936
South Chahar Autonomous Government
察南自治政府
Was estabilished on: 4 September, 1937
North Shanxi Autonomous Government
晋北自治政府
Was estabilished on: 15 October, 1937
Mongol United Autonomous Government
蒙古联盟自治政府
Was estabilished on: 27 October, 1937
The Great Way Municipal Government of Shanghai
上海市大道政府
Was estabilished on: 5 December, 1937
Provisional Government of the Republic of China
中華民國臨時政府
Was estabilished on: 14 December, 1937
Reformed Government of the Republic of China
中華民國維新政府
Was estabilished on: 28 March, 1938
Mengjiang United Autonomous Government
蒙疆聯合自治政府
Was estabilished on: 1 September, 1939
Reorganized Nationalist Government of the Republic of China
中華民國國民政府改組
Was estabilished on: 30 March, 1940
Other Japanese Puppet States:
State of Burma
ビルマ国
ဗမာနိုင်ငံတော်
Was estabilished on: 1 August, 1943
Republic of the Philippines
Repúbliká ng Pilipinas
República de Filipinas
フィリピン共和国
Was estabilished on: 14 October, 1943
Provisional Government of Free India
आर्ज़ी हुकूमत-ए-आज़ाद हिन्द
Was estabilished on: 21 October, 1943
Kingdom of Cambodia
ព្រះរាជាណាចក្រកម្ពុជា
カンボジア王国
Was estabilished on: 9 March, 1945
Empire of Vietnam
Đế quốc Việt Nam
越南帝國
Was estabilished on: 9 March, 1945
Kingdom of Luang Phrabang
ອານາຈັກຫຼວງພະບາງ
ルアンプラバン王国
Was estabilished on: 8 April, 1945