Kokumin-fuku

The lit. 'national uniform' (国民服) was the European-style men's civil uniform introduced in Japan in 1940 during World War II. A similiar-looking uniform was earlier introduced in Manchuria and was known as kyowa-fuku (協和服) or kai-fuku (会服).

Its similarity to a military uniform was allegedly one of the reasons for heavy casualties among Japanese civilians when the Soviet army attacked in 1945.