17 rule sets, from Hong Kong parlours and Japanese professional leagues to Sichuan teahouses,
Singaporean animal tiles and the American card — how many play, how many tiles, how big the hand, and how it scores.
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Rule sets
Want the three biggest styles side by side? See Rules compared.
Japanese
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Japanese
Japanese Riichi
Japan and worldwide online
Japan's modern game, with a mandatory scoring pattern, a ready-hand declaration and deep defensive play. Professional leagues and huge online ladders.
Japanese