Riichi Mahjong Yaku List

Every yaku our game scores, with han for a closed / open hand. Tap a yaku with a guide for examples, scoring and odds.

In-depth guides

Riichi 1 han（closed only） Declare it with a closed tenpai hand for 1 han: requirements, the rules after riichi, ippatsu and ura dora, win rate and average result. Menzen Tsumo 1 han（closed only） Win on your own draw with a closed hand for 1 han: requirements, tsumo fu, pinfu tsumo, and why calling loses it. Pinfu 1 han（closed only） Four sequences, a non-value pair and a two-sided wait — closed only, 1 han. Waits, 20 vs 30 fu, common combos. Tanyao Closed 1 / open 1 Only 2–8 number tiles, 1 han, calling allowed here. Examples, common combos, and how many simples you need to force it. Yakuhai Closed 1 / open 1 A triplet of dragons, seat wind or round wind — 1 han, even when called. Double wind, atozuke and one-sided waits. Iipeikou 1 han（closed only） Two identical sequences, closed only, 1 han. Examples, why a call kills it, and how it differs from ryanpeikou and chiitoitsu. Ippatsu 1 han（closed only） Win within one go-around of riichi for 1 more han: the rules, what cancels it, examples and odds. Rinshan kaihou Closed 1 / open 1 Win on the replacement tile after a kan — 1 han, open or closed. Rules, scoring examples, kan dora and how often it happens. Chankan Closed 1 / open 1 Ron the tile someone adds to their pon — 1 han. Rules, closed kans, scoring examples and how often it happens. Haitei Closed 1 / open 1 Win by tsumo on the last tile of the wall — 1 han, open or closed. Rules, how the last tile moves, scoring and odds. Houtei Closed 1 / open 1 Ron the very last discard of the hand — 1 han, open or closed. Rules, why it can't be called, scoring and odds. Double Riichi 2 han（closed only） Riichi on your first discard for 2 han instead of 1: the rules, what stops it, examples and the odds of a tenpai start. Chiitoitsu 2 han（closed only） Seven different pairs, closed only, 2 han 25 fu. Examples, picking your wait, combos, and how many pairs make it worth it. Sanshoku Closed 2 / open 1 The same sequence in all three suits — 2 han closed, 1 open. Examples, common combos and how to spot a sanshoku chance. Ittsu Closed 2 / open 1 1-2-3, 4-5-6 and 7-8-9 in one suit — 2 han closed, 1 open. Examples, waits and common combos. Toitoi Closed 2 / open 2 Four triplets and a pair, still 2 han when open. Examples, scoring combos and how many starting pairs you need. Chanta Closed 2 / open 1 Every set and the pair hold a terminal or honor — 2 han closed, 1 open. Chanta vs junchan, and common combos. Sanankou Closed 2 / open 2 Three self-drawn triplets, 2 han even when open. The shanpon-ron trap, why the fu are high, and how it differs from suuankou. Sanshoku doukou Closed 2 / open 2 The same number as a triplet in all three suits, 2 han even open. Versus sanshoku doujun, common combos, and why it's rare. Sankantsu Closed 2 / open 2 Three kans by one player — 2 han, even open. Rules, big fu, common combos and the four-kan draw. Honroutou Closed 2 / open 2 Only 1s, 9s and honors — 2 han even when open, always with toitoi or chiitoitsu. Examples, combos and odds. Shousangen Closed 2 / open 2 Two dragon triplets and a dragon pair: 2 han, at least 4 with its two yakuhai. Honitsu Closed 3 / open 2 One suit plus honors — 3 han closed, 2 open. Examples, honitsu vs chinitsu, and how many tiles you need to go for it. Junchan Closed 3 / open 2 A 1 or 9 in every set and the pair, no honors — 3 han closed, 2 open. Junchan vs chanta, and junchan sanshoku. Ryanpeikou 3 han（closed only） Two iipeikou, closed only, 3 han. Examples, the difference from chiitoitsu, combos and how rare it is. Chinitsu Closed 6 / open 5 Every tile from one suit — 6 han closed, 5 open. Examples, chinitsu vs honitsu, and how many suited tiles you need. Kokushi musou Yakuman（closed only） One of each terminal and honor plus a pair — a yakuman. The 13-sided wait is a double yakuman here, the furiten trap, and what to do with nine terminals. Suuankou Yakuman（closed only） Four concealed triplets, closed only — a yakuman. Shanpon needs tsumo, a single wait wins on ron too (double yakuman here), and how many pairs you need. Daisangen Yakuman Triplets of all three dragons — a yakuman even when called. Examples, pao rules and starting-hand odds. Shousuushii Yakuman Three wind triplets and a wind pair — a yakuman even when called. Examples, vs daisuushii, and odds. Daisuushii Yakuman Triplets of all four winds — a yakuman even when called; double yakuman by default. Example, pao and odds. Tsuuiisou Yakuman All 14 tiles honors — a yakuman, called or closed, seven pairs allowed. Examples, combos and odds. Chinroutou Yakuman A yakuman of only 1s and 9s, open or closed. Examples, the difference from honroutou, and how unlikely it is. Ryuuiisou Yakuman Only 2-3-4-6-8 bamboo and green dragon — a yakuman, calls allowed. No green dragon needed here, and very few sets are possible. Chuuren poutou Yakuman（closed only） A closed 1112345678999 plus one tile — a yakuman. The 9-sided wait is junsei chuuren (double yakuman here), its link to chinitsu, and how rare it is. Suukantsu Yakuman Four kans by one player, then a single-wait win — yakuman. Rules, the four-kan draw, combos and scoring. Tenhou Yakuman（closed only） The dealer is complete on the deal: a yakuman of pure luck. Rules, tenhou vs chiihou, stacking yakuman, and the odds. Chiihou Yakuman（closed only） A non-dealer wins on their first draw: the rules, what stops it, chiihou vs tenhou and renhou, and the odds.

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