jp mahjongJapanese Mahjong How to play Mahjong. Riichi (1 fan) When your hand is ready and fully concealed, you can call Riichi. Daburu-Riichi (2 fan) First turn Riichi. Ippatsu (1 fan) WinningJapanese mahjong (, or マージャン), otherwise known as riichi mahjong, is the Japanese varation to the 4-player table card game of mahjong, whose objective can be best