Yakuman (役満) is a 1989 game for the Game Boy and the only Game Boy launch title never released outside of Japan. The other launch titles were Alleyway, Baseball and Super Mario Land. The game is based on the popular Chinese board game Mahjong, and is named after the winning hand Yakuman. It is based on Nintendo's previous Mahjong products, including Mahjong for the Famicom/NES and the early stand-alone game Computer Mahjong: Yakuman.