1941 Counter Attack was released on August 23, 1991 in Japan.
1941 Counter Attack was originally released in the arcades in 1990. The SuperGrafx conversion was the first and only port available for a long while. This port if fairly close to the original arcade game. The first obvious difference is the screen aspect ratio. The width of the playfield is close (although shorter) to the arcade, but the vertical display is much shorter. The rest of the game is incredibly faithful to the original game and only suffers from minor (and extremely rare) graphical alterations.
November 1991 - Consoles + N.2
October 1991 - Joypad N.1