mahjong jpRiichi Mahjong is the Japanese variant of Mahjong that focuses on strategy, precise scoring, and unique rules like Riichi (a declaration of a ready hand). It requires players to fulfill at least one Yaku (scoring pattern) to declare aJapanese mahjong 「 or マージャン」, or mahjong 「リーチ」, is the Japanese variation to the 4-player table game of mahjong. Best described as a combination of