← All yakuDouble Riichi (両立直)2 hanRiichi declared on your first uninterrupted draw.Open Riichi calculator →Other 2-han yakuChiitoitsu (七対子)2 hanSanshoku Doukou (三色同刻)2 hanSanshoku Doujun (三色同順)2 hanIttsu (一気通貫)2 han