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Riichi Mahjong Yaku List
All 42 yaku in Riichi Mahjong, with han value and how often each one appears in real games.
| Yaku | Example | Han | Share of hands |
|---|---|---|---|
| 1 han | |||
Riichi立直         Win after declaring Riichi. You may declare Riichi with a closed Tenpai hand (no chow, pung, or open kong), then discard a tile and place a 1,000-point Riichi stick. After that, you cannot change the hand. | Win after declaring Riichi. You may declare Riichi with a closed Tenpai hand (no chow, pung, or open kong), then discard a tile and place a 1,000-point Riichi stick. After that, you cannot change the hand. | 1closed only | 52.0% |
Yakuhai翻牌・役牌       Win with a triplet or quad(seat winds, prevailing winds, White, Green or Red Dragons) in your hand. (triplet: a group of three identical tiles; quad: a group of four identical tiles) | Win with a triplet or quad(seat winds, prevailing winds, White, Green or Red Dragons) in your hand. (triplet: a group of three identical tiles; quad: a group of four identical tiles) | 1 | 29.1% |
Ippatsu一発 Call Ron or Tsumo within an uninterrupted turn (no player calls Chow, Pung, or Kong) after declaring Riichi. | Call Ron or Tsumo within an uninterrupted turn (no player calls Chow, Pung, or Kong) after declaring Riichi. | 1closed only | 13.5% |
Fully Concealed Hand門前清自摸 · Menzenchintsumo   Win on a self-drawn tile (Tsumo) with your closed hand (no Chow, Pung or Open Kong). A closed hand will still be closed after declaring a Concealed Quad. | Win on a self-drawn tile (Tsumo) with your closed hand (no Chow, Pung or Open Kong). A closed hand will still be closed after declaring a Concealed Quad. | 1closed only | 12.5% |
Pinfu平和   Win with a closed hand containing four Sequences and a pair, and the winning tile completes a Sequence with a two-sided wait. The pair cannot be dragon tiles, player’s wind or round wind; numbered tiles or non-value wind tiles are allowed. | Win with a closed hand containing four Sequences and a pair, and the winning tile completes a Sequence with a two-sided wait. The pair cannot be dragon tiles, player’s wind or round wind; numbered tiles or non-value wind tiles are allowed. | 1closed only | 12.4% |
All Simples断幺九 · Tanyaochuu Win with no Terminal or Honor Tiles in your hand. | Win with no Terminal or Honor Tiles in your hand. | 1 | 11.1% |
Pure Double Sequence一盃口 · Iipeekou   Win with a closed hand containing two identical sequences. | Win with a closed hand containing two identical sequences. | 1closed only | 2.9% |
| Under the River河底撈魚 · HouteiWin on the final discarded tile. | Win on the final discarded tile. | 1 | 0.5% |
| Under the Sea海底摸月 · HaiteiWin by Tsumo on the final tile drawn from the wall. | Win by Tsumo on the final tile drawn from the wall. | 1 | 0.2% |
| After a Kan嶺上開花 · RinshankaihouWin on a tile drawn from the Dead Wall right after declaring a Quad. | Win on a tile drawn from the Dead Wall right after declaring a Quad. | 1 | 0.2% |
Robbing a Kan搶槓 · Chankan   Win on a tile that an opponent adds to a melded Triplet in order to make a Quad. | Win on a tile that an opponent adds to a melded Triplet in order to make a Quad. | 1 | 0.096% |
| 2 han | |||
| Seven Pairs七対子 · ChiitoitsuWin with a closed hand containing seven different pairs. | Win with a closed hand containing seven different pairs. | 2closed only | 3.7% |
Mixed Triple Sequence三色同順 · Sanshokudoujun  Win with three sequences of the same numerical sequence, one in each of the three suits. | Win with three sequences of the same numerical sequence, one in each of the three suits. | 2 (1 open) | 1.4% |
| All Triplets対々和 · ToitoiWin with four Triplets or Quads. | Win with four Triplets or Quads. | 2 | 1.2% |
Pure Straight一気通貫 · Ikkitsuukan Win with three consecutive sequences (i.e., 123, 456,789) in the same suit. | Win with three consecutive sequences (i.e., 123, 456,789) in the same suit. | 2 (1 open) | 0.8% |
Half Outside Hand混全帯幺九 · Chanta Win with four Sequences, Triplets or Quads and a pair. All groups and the pair must contain Terminal and/or Honor Tiles. | Win with four Sequences, Triplets or Quads and a pair. All groups and the pair must contain Terminal and/or Honor Tiles. | 2 (1 open) | 0.5% |
| Three Concealed Triplets三暗刻 · SanankouWin with three Concealed Triplets or Quads. | Win with three Concealed Triplets or Quads. | 2 | 0.3% |
| Double Riichiダブルリーチ · DaburiiDeclare Riichi with your starting hand in the first uninterrupted turn (no player calls Chow, Pung, or Kong). | Declare Riichi with your starting hand in the first uninterrupted turn (no player calls Chow, Pung, or Kong). | 2closed only | 0.2% |
| Little Three Dragons小三元 · ShousangenWin with a hand containing two Triplets or Quads of Dragons (White, Green or Red) plus a pair of Dragons. | Win with a hand containing two Triplets or Quads of Dragons (White, Green or Red) plus a pair of Dragons. | 2 | 0.027% |
| Triple Triplets三色同刻 · SanshokudoukouWin with three Triplets or Quads of the same number, one in each suit. | Win with three Triplets or Quads of the same number, one in each suit. | 2 | 0.011% |
| Three Quads三槓子 · SankantsuWin with three Quads (Melded Quad or Concealed Quad). | Win with three Quads (Melded Quad or Concealed Quad). | 2 | 0.0036% |
| All Terminals and Honours混老頭 · HonroutouWin with four Triplets or Quads and a pair or Chiitoitsu in your hand containing only Terminal and Honor Tiles. | Win with four Triplets or Quads and a pair or Chiitoitsu in your hand containing only Terminal and Honor Tiles. | 2 | 0.0034% |
| 3 han | |||
| Half Flush混一色 · HonitsuWin with a hand containing Number Tiles in the same suit and Honor Tiles. | Win with a hand containing Number Tiles in the same suit and Honor Tiles. | 3 (2 open) | 1.5% |
| Fully Outside Hand純全帯幺九 · JunchantaiyaoWin with four Sequences, Triplets or Quads containing Terminals. And pair of terminals in your hand. | Win with four Sequences, Triplets or Quads containing Terminals. And pair of terminals in your hand. | 3 (2 open) | 0.08% |
| Twice Pure Double Sequence二盃口 · RyanpeekouWin with four sequences forming two distinct two identical sequences in your closed hand. | Win with four sequences forming two distinct two identical sequences in your closed hand. | 3closed only | 0.013% |
| Mangan | |||
| Nagashi Mangan流し満貫You'll achieve Mangan when the game ends in a draw, with all your discarded tiles being Terminals and/or Honors, and no player has called them. | You'll achieve Mangan when the game ends in a draw, with all your discarded tiles being Terminals and/or Honors, and no player has called them. | Mangan | 0.00073% |
| 6 han | |||
| Full Flush清一色 · ChinitsuWin with a hand containing only Number Tiles in the same suit. | Win with a hand containing only Number Tiles in the same suit. | 6 (5 open) | 0.2% |
| Yakuman | |||
| Thirteen Orphans国士無双 · KokushimusouWin with a closed hand containing each of the thirteen different Terminal and Honor Tiles, plus one extra Terminal or Honor Tile. | Win with a closed hand containing each of the thirteen different Terminal and Honor Tiles, plus one extra Terminal or Honor Tile. | Yakumanclosed only | 0.082% |
| Big Three Dragons大三元 · DaisangenWin with three Triplets or Quads of Dragon Tiles (White, Green and Red Dragons). | Win with three Triplets or Quads of Dragon Tiles (White, Green and Red Dragons). | Yakuman | 0.0097% |
| Four Concealed Triplets四暗刻 · SuuankouWin with four Concealed Triplets in your closed hand. | Win with four Concealed Triplets in your closed hand. | Yakumanclosed only | 0.008% |
| All Honors字一色 · TsuuiisouWin with a hand containing only Honor Tiles. | Win with a hand containing only Honor Tiles. | Yakuman | 0.0022% |
| All Terminals清老頭 · ChinroutouWin with a hand containing only Terminal Tiles, i.e., 1-Man, 9-Man, 1-Pin, 9-Pin, 1-Sou and/or 9-Sou. | Win with a hand containing only Terminal Tiles, i.e., 1-Man, 9-Man, 1-Pin, 9-Pin, 1-Sou and/or 9-Sou. | Yakuman | 0.0015% |
| Four Little Winds小四喜 · ShousuushiiWin with a hand containing three Triplets or Quads of Wind Tiles and a pair of the fourth Wind Tiles. | Win with a hand containing three Triplets or Quads of Wind Tiles and a pair of the fourth Wind Tiles. | Yakuman | 0.0015% |
| Blessing of Earth地和 · ChiihouWin by Tsumo as a non-dealer (not East player) on the self-drawn tile in the first uninterrupted turn (no player calls chow, Pung, or Kong). | Win by Tsumo as a non-dealer (not East player) on the self-drawn tile in the first uninterrupted turn (no player calls chow, Pung, or Kong). | Yakumanclosed only | 0.00073% |
| All Green緑一色 · RyuuiisouWin with a hand containing only green tiles, i.e., 2-Sou, 3-Sou, 4-Sou,6-Sou,8-Sou and/or Green Dragons. | Win with a hand containing only green tiles, i.e., 2-Sou, 3-Sou, 4-Sou,6-Sou,8-Sou and/or Green Dragons. | Yakuman | 0.00024% |
| Blessing of Heaven天和 · TenhouWin as the dealer (East player) on your initial self-drawn tile in the first turn. | Win as the dealer (East player) on your initial self-drawn tile in the first turn. | Yakumanclosed only | 0.00024% |
| Four Big Winds大四喜 · DaisuushiiWin with four Triplets or Quads of Wind Tiles. | Win with four Triplets or Quads of Wind Tiles. | Yakuman | 0% |
| Four Quads四槓子 · SuukantsuWin with a hand containing four Quads. | Win with a hand containing four Quads. | Yakuman | 0% |
| Nine Gates九蓮宝灯 · ChuurenpoutouWin with a closed hand consisting of the tiles 1112345678999 in the same suit, plus any extra tile in the same suit. | Win with a closed hand consisting of the tiles 1112345678999 in the same suit, plus any extra tile in the same suit. | Yakumanclosed only | 0% |
| Double yakuman | |||
| Single-Wait Four Concealed Triplets四暗刻・単騎待ち · SuuankoutankiAchieve Tenpai with a single-wait for four concealed pungs, and win on a tile that forms a pair in your hand. | Achieve Tenpai with a single-wait for four concealed pungs, and win on a tile that forms a pair in your hand. | Double yakumanclosed only | 0.00049% |
| Thirteen-Wait Thirteen Orphans国士無双・十三面待ち · KokushimusoujuusanmenAchieve Tenpai with a 13-sided wait for thirteen orphans, and win any one of the thirteen tiles. | Achieve Tenpai with a 13-sided wait for thirteen orphans, and win any one of the thirteen tiles. | Double yakumanclosed only | 0.00024% |
| True Nine Gates純正九蓮宝燈Achieve Tenpai with a 9-sided wait for pure nine gates, and win on any one of the nine Number Tiles in the same suit. | Achieve Tenpai with a 9-sided wait for pure nine gates, and win on any one of the nine Number Tiles in the same suit. | Double yakumanclosed only | 0.00024% |
Source: Mahjongo, 411,235 Riichi hands in rooms against bots with at least one human player, May 1, 2026 to October 31, 2026. Counts include hands won by bots. Updated monthly.See all Riichi yaku statistics