← All yakuRyuuiisou (緑一色)13 hanAll-green — only 2,3,4,6,8s and 6z.Example winning handWinning tile: 6s▶ Try this hand in the calculatorOpen Riichi calculator →Other 13-han yakuKokushi Musou (国士無双)13 hanSuuankou (四暗刻)13 hanDaisangen (大三元)13 hanShousuushii (小四喜)13 han