Honkaku Yonin Uchi Mahjong - Mahjong Ou is a Mahjong game released in Japan for the Game Boy Color. As a Game Boy Color title, its gameplay would have involved simplified controls adapted to the handheld's D-pad and buttons.  The focus would have been on the core Mahjong rules and experience, with the visual presentation adjusted for the system's technical limitations.  Given the title, "Honkaku" suggesting authenticity, the game likely aimed for a realistic Mahjong simulation within the constraints of the hardware.  The game's developer and publisher are currently unknown. 

Honkaku Yonin Uchi Mahjong - Mahjong Ou (Japan)

Honkaku Hanafuda GB (Japan)