This page is aimed at riichi mahjong rules specialists. If you're new to the game, you'd better read the detailed rules instead.
Those data come from the official rules shown on their organizations' website (see at the bottom of the page), and from various personal communications.
Thanks to everyone who helped me.
A special thanks to Barticle for his
Japanese Mahjong Guide.
If you spot any mistake and/or have reliable data to fill the holes, please report them to me via the contact page of this website.Scroll down to select the rules to display.
Hover the titles and fields marked with
to get more info.
After-attachingAllows to win by ron even if one or more of the tiles that a player is waiting on will not give a yaku. | Allows to win by ron even if one or more of the tiles that a player is waiting on will not give a yaku. | | | | | | | | | | | | | | | | | | | | | | | | atozuke | 後付け |
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Goal | 30k | 30k | 30k | 30k | 30k | 30k | 30k | 30k | 30k | 30k | 30k | 30k | | 30k | 29k | 30k | 30k | 30k | 30k | | 30k | 30k | 30k | genten | 原点 |
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Oka | 0 | 0 | 0 | 0 | 20 | 20k | 0 | 0 | 0 | 0 | 20k | 0 | | 0 | 0 | 0 | 20k | 0 | 20k | | 20k | 20k | 0 | oka | オカ |
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Uma | 15/5+15/+5/-5/-15 | 15/5+15/+5/-5/-15 | Uma depends on how many players are "positive" (≥30k) or "negative" (<30k):
1 positive: | +12/-1/-3/-8 | 2 positive: | +8/+4/-4/-8 | 3 positive: | +8/+3/+1/-12 | all negative: | +8/+4/-4/-8 |
| 15/5+15/+5/-5/-15 | 30/10+30/+10/-10/-30 (uma+oka: +50/+10/-10/-30) | 30/10+30/+10/-10/-30 (uma+oka: +50/+10/-10/-30) | 30/10+30/+10/-10/-30 | 12/4+12/+4/-4/-12 | 15/5+15/+5/-5/-15 | 15/5+15/+5/-5/-15 | 0/00/0/0/0 (uma+oka: +20/0/0/0) | 12/4+12/+4/-4/-12 | | 20/10+20/+10/-10/-20 | 30/15+30/+15/-15/-30 | 0/00/0/0/0 | 30/10+30/+10/-10/-30 (uma+oka: +50/+10/-10/-30) | 15/5+15/+5/-5/-15 | 20/10+20/+10/-10/-20 (uma+oka: +40/+10/-10/-20) | | | | 0/00/0/0/0 | uma | ウマ / 順位点 |
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In case of tie | divide | divide | divide | divide | divide | divide | | divide | divide | divide | | divide | | bump | | N/A | bump | divide | bump | bump | | bump | N/A | dōten | 同点 |
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Continuance pointsPoints for each continuance counter. | Points for each continuance counter. | 3x100 | 3x100 | 3x100 | 3x100 | 3x100 | 3x100 | 3x100 | 3x100 | 3x100 | 3x100 | 3x100 | 0 | 0 | 3x100 | | 3x100 | 3x100 | 3x100 | 3x100 | | | 3x100 or 3x500 (optional rule) | 3x100 | tsumibō | 積み棒 |
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Noten penalty | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | 0 | 3000 | 3000 | 3000 | 3000 | 0 | 3000 | 3000 | | 3000 | 3000 | 3000 | | | 3000 | 3000 | noten batsufu | ノーテン罰符 |
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Ura dora | | | | | | | | | | | | | | | | | | | | | | | | uradora | 裏ドラ |
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Kan dora | | | | | | | | | | | | | | | | | | | | | | | | kandora | 槓ドラ |
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Kan ura dora | | | | | | | | | | | | | | | | | | | | | | | | kanuradora | 槓表ドラ |
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Red fivesAll rules listed here that use red fives use one red five in each suit. | All rules listed here that use red fives use one red five in each suit. | | | | | | | | | | | | | | | | | | | | | | | | akadora | 赤ドラ |
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Triple ron: | All winners are paid. | bump: | "Head bump" Only one winner: the one closer to the discarder, in the turn order. | first: | Only one winner: the fastest to declare the win, or head bump if simultaneous. | cancel: | Cancel the hand. |
| : | All winners are paid. | bump: | "Head bump" Only one winner: the one closer to the discarder, in the turn order. | first: | Only one winner: the fastest to declare the win, or head bump if simultaneous. | cancel: | Cancel the hand. |
| bump | | bump | bump | bump | bump | bump | bump | bump | bump | bump | bump | "bump" or "first", I don't know. | first | cancel | cancel | first | bump | cancel | | cancel | | | san cha hō | 三家和 |
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Continuance paymentWho gets the continuance counters in case of multiple winner.
bump: | Only the player closer to the discarder, in turn order. | all: | Each winner gets full payment. |
| Who gets the continuance counters in case of multiple winner.
bump: | Only the player closer to the discarder, in turn order. | all: | Each winner gets full payment. |
| N/A | all | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | | N/A | N/A | bump | bump | bump | | | tsumibō | 積み棒 |
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Riichi deposits payment | N/A | bump | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | | N/A | N/A | | bump | | | | riichibō | リーチ棒 |
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Kandora timingWhether the kandora indicator is revealed before or after discarding. | Whether the kandora indicator is revealed before or after discarding. | | | | | | | | | | | | | | | | | | | | | | | | kandora no noru timing | 槓ドラの乗るタイミング |
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Called/Promoted quad | before | before | N/A | | before | | | N/A | | N/A | | N/A | N/A | before | | | | | after | before | | | | minkan | 大明槓、小明槓 |
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Concealed quad | before | before | N/A | | before | | | N/A | | N/A | | N/A | N/A | before | | | | | before | before | | | | ankan | 暗槓 |
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Nine term. / honours | | | | | | | | | | | | | | | | | | | | | | | | kyū shu kyū hai | 九種九牌 |
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Four winds | | | | | | | | | | | | | | | | | | | | | | | | sū fon renda | 四風連打 |
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Four quads | | | | | | | | | | | | | | | | | | | | | | | | sū kai kan | 四開槓 |
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Four riichi | | | | | | | | | | | | | | | | | | | | | | | | sū cha riichi | 四家立直 |
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Triple ron | | | | | | | | | | | | | | | | | | | | | | | | san cha hō | 三家和 |
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Continuation when abortionIn case of abortive draw:
: | East player stays East. | : | The deal rotates (South player becomes East). |
| In case of abortive draw:
: | East player stays East. | : | The deal rotates (South player becomes East). |
| N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | | | N/A | N/A | | | | N/A | N/A | tochû ryūkyoku no bāi wa renchan | 途中流局の場合は連荘 |
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Nb quads max | 4 | 4 | 4 | | 4 | | 4 | 4 | 4 | 4 | 4 | 4 | | | 4 | 4 | 4 | | 4 | 4 | 4 | | 4 | kan no kaisū seigen | カンの回数制限 |
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Big Dragons | | | | | | | | | | | | | | | | | | | | | | | | daisangen | 大三元 |
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Big Winds | | | | | | | | | | | | | | | | | | | | | | | | daisūshi | 大四喜 |
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Four Quads | | | | | | | | | | | | | | | | | | | | | | | | sūkantsu | 四槓子 |
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After a QuadAfter a Quad on a called quad ("big melded quad") is a win by ron. | After a Quad on a called quad ("big melded quad") is a win by ron. | | | | | | | | | | | | | | | | | | | | | | | | rinshan kaihō | 嶺上開花 |
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Continuance paymentWho pays the continuance counters in case of liability.
feeder: | Player who had feed the hand. | discarder: | Player who discarded to winning tile. |
| Who pays the continuance counters in case of liability.
feeder: | Player who had feed the hand. | discarder: | Player who discarded to winning tile. |
| discarder | discarder | discarder | discarder | | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | | N/A | feeder | | discarder | feeder | | | | discarder | tsumibō no futan | 積み棒の負担 |
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Apply if other yakuman | | | | | | N/A | N/A | N/A | N/A | N/A | N/A | | N/A | | N/A | | | | | | | | | fukugō yakuman o fukumu | 複合役満を含む |
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Tenpai yameEast can stop the game if he is tenpai on the last hand.
1st: | Only if East is first. | 1;2: | Only if East is first or second. | ...
| East can stop the game if he is tenpai on the last hand.
1st: | Only if East is first. | 1;2: | Only if East is first or second. | ...
| | | | | | | | | | | | | | | | | | | 1st | | 1;2;3 | | | tenpai yame | テンパイ止め |
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AutomaticAutomatic agari / tenpai yame, depending on East player's rank. | Automatic agari / tenpai yame, depending on East player's rank. | N/A | N/A | N/A | N/A | | N/A | N/A | N/A | N/A | N/A | N/A | N/A | | | | | | | | | 1st | 1st | N/A | ōtoma jūryō | オートマ終了 |
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Riichi: 1000pts minPlayers must have at least 1000 points to declare riichi. | Players must have at least 1000 points to declare riichi. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | | | N/A | | | | | | N/A | 1000ten o kiru to riichi | 1000点を切るとリーチ |
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Max pointsGame ends if someone gets the points' limit (or more). | Game ends if someone gets the points' limit (or more). | | | | | | | | | | | | | | | | | | | | | 60k | | | toppu uchikiri | トップ打ち切り |
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Sudden deathThe West round ends when someone reach the goal (30k points) or more. | The West round ends when someone reach the goal (30k points) or more. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | Must end with a winning hand (i.e. no final victory on a draw or chonbo). | N/A | | | | | | N/A | sadon desu | サドンデス |
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Yakuman stacking | | | | | | | | | | | | | | | | | | | | | | | | fukugō yakuman | 複合役満 / 役満重複 |
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Riichi without a next drawAllows to declare riichi if you don't have a next draw. | Allows to declare riichi if you don't have a next draw. | | | | | | | | | | | | | | | | | | | | | | | | tsumoban ga nakutemo riichi | ツモ番がなくてもリーチ |
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Riichi on the last tile | | | | | | | | | | | | | | | | | | | | | | | | haitei riichi | 海底リーチ |
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On any tileAllows to declare a concealed quad after riichi, even if the drawn tile doesn't match the quad.
: | A quad after riichi can be completed with a tile from the hand, or with the drawn tile. | : | A quad after riichi can only be completed with the drawn tile. |
| Allows to declare a concealed quad after riichi, even if the drawn tile doesn't match the quad.
: | A quad after riichi can be completed with a tile from the hand, or with the drawn tile. | : | A quad after riichi can only be completed with the drawn tile. |
| | | | | | | | N/A | | | | N/A | N/A | | | | | | | | | | | nandemo pai | なんでも牌 |
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If changes waitAllows to declare a concealed quad after riichi, even if the new hand is not waiting on the exact same tiles. E.g.: 11123s RRR GGG EE, waiting on 1s / 4s / E ; by making a kan of 1s, the hand would only wait on 4s. (Please note: changing the wait would also change the hand structure.) | Allows to declare a concealed quad after riichi, even if the new hand is not waiting on the exact same tiles. E.g.: 11123s RRR GGG EE, waiting on 1s / 4s / E ; by making a kan of 1s, the hand would only wait on 4s. (Please note: changing the wait would also change the hand structure.) | | | | | | | | N/A | | | | N/A | N/A | | | | | | | | | | | machi ga kawaru | 待ちが変わる |
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If changes hand structure: | Allows to declare a concealed quad after riichi, even if it changes the hand structure. | : | The hand structure must stay the same. The three other tiles can only be interpreted as a triplet in the original riichi hand, even considering for combinations giving the hand a lower value. | E.g.: The hand 666s 777s 888s RR EE can also be interpreted as 678s 678s 678s RR EE. Making a quad of 6s, 7s or 8s would make the second interpretation impossible, thus changing the hand structure.
| : | Allows to declare a concealed quad after riichi, even if it changes the hand structure. | : | The hand structure must stay the same. The three other tiles can only be interpreted as a triplet in the original riichi hand, even considering for combinations giving the hand a lower value. | E.g.: The hand 666s 777s 888s RR EE can also be interpreted as 678s 678s 678s RR EE. Making a quad of 6s, 7s or 8s would make the second interpretation impossible, thus changing the hand structure.
| | | | | | | | N/A | | | | N/A | N/A | | | | | | | | | | | tehai kōsei ga kawaru | 手牌構成が変わる |
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If changes yakuAllows to declare a concealed quad after riichi, even if it changes the hand's yaku. E.g.: 123s 1111m 1111p 555p E ; by making a kan of 5p, the hand would gain the Three Quads yaku. | Allows to declare a concealed quad after riichi, even if it changes the hand's yaku. E.g.: 123s 1111m 1111p 555p E ; by making a kan of 5p, the hand would gain the Three Quads yaku. | | | Concealed quad after riichi is forbidden if it lowers the score. | Concealed quad after riichi is forbidden if it lowers the score. | | | | N/A | | | | N/A | N/A | | | | | | | | | | | teyaku ga kawaru | 役が変わる |
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5th tile in own handThe hand needs five identical tiles. | The hand needs five identical tiles. | | | | | | | | | | | | | | | | | | | | | | | | gomaime o matsu tenpai | 5枚目を待つ聴牌 |
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UnbrokenIppatsu | | | | | | | | | | | | | | | | | | | | | | | | ippatsu | 一発 |
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Double Riichi | | | | | | | | | | | | | | | | | | | | | | | | daburu riichi | ダブル立直 |
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Open Riichi | | | | | | | | | | | | | | | | Allowed for casual games ; forbidden during competitions. | | | | | | | Yakuman if won on discard of a player who did not riichi. Otherwise: 2 han. | open riichi | オープン立直 |
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All InsideAll Simples | | | | | | | | | | | | | | | | | | | | | | | | tan'yao | 断么九 |
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Pinfu | | | | | | | | | | | | | | | | | | | | | | | | pinfu | 平和 |
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Double Twin SequencesTwice Pure Double Chow | | | | | | | | | | | | | | | | | | | | | | | | ryanpeikō | 二盃口 |
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Double Wind | | | | | | | | | | | | | | | | | | | | | | | | renfonpai | 連風牌 |
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After a Quad | | | | | | | | | | | | | | | | | | | | | | | | rinshan kaihō | 嶺上開花 |
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Last Tile Claim | | | | | | | | | | | | | | | | | | | | | | | | hōtei | 川底撈魚 |
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Triple Triplets | | | | | | | | | | | | | | | | | | | | | | | | sanshoku dōkō | 三色同刻 |
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Three Concealed Triplets | | | | | | | | | | | | | | | | | | | | | | | | san'ankō | 三暗刻 |
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Three Quads | | | | | | | | | | | | | | | | | | | | | | | | sankantsu | 三槓子 |
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Perfect EndsTerminals in All Sets | | | | | | | | | | | | | | | | | | | | | | | | junchan | 純全帯 |
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Little DragonsLittle Three Dragons | | | | | | | | | | | | | | | | | | | | | | | | shōsangen | 小三元 |
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Perfect FlushFull Flush | | | | | | | | | | | | | | | | | | | | | | | | chin'itsu | 清一色 |
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Blessing of Heaven | | | | | | | | | | | | | | | | | | | | | | | | tenhō | 天和 |
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Blessing of Earth | | | | | | | | | | | | | | | | | | | | | | | | chihō | 地和 |
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Nine Gates | | | | | | | | | | | | | | | | | | | | | | | | chūren pōto | 九蓮宝燈 |
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All Green | | | | | | | | | | | | | | | | | | | | | | | | ryūiisō | 緑一色 |
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Four Quads | | | | | | | | | | | | | | | | | | | | | | | | sūkantsu | 四槓子 |
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All Honours | | | | | | | | | | | | | | | | | | | | | | | | tsūiisō | 字一色 |
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Big WindsBig Four Winds | | | | | | | | | | | | | | | | | | | | | | | | daisūshi | 大四喜 |
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Nine Gates on 9 waits | | | | | | | | | | | | | | | | | | | | | | | | chūrenpōtō kyū men machi | 九蓮宝燈 九面待ち |
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Four Concealed Triplets on the pair | | | | | | | | | | | | | | | | | | | | | | | | sūankō tanki machi | 四暗刻 卖騎待ち |
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13 isolated tiles | | | | | | | | | | | | | | | | | | | | | | | | shiisan pūtā | 十三不塔 |
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8 consecutive wins | | | | | | | | | | | | | | | | | | | | | | | | pā renchan | 八連荘 |
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Other yakus | | | | | | | | | | | | | | | | | | | | | | | Sanrenkou : | 2 han | Suurenkou : | yakuman | Iisou Sanshun : | 2 han | Iisou Suushun : | yakuman | Beni Kujaku : | yakuman | Kinkei Dokuritsu : | mangan | Otakaze San Kou : | 2 han | Uu Men Sai : | 2 han, closed only, sequential are allowed | Go Zoku Kyouwa : | yakuman, closed only, triplets only | Tsubame Gaeshi : | 1 han | Shou Sharin : | 2 han | Hyakuman Goku : | yakuman | Ao no Doumon : | Yakuman, must be 2, 4, 8 pinzu and winds | Kinmonkyou : | 2 han, with any pair, may be open | Dai Kinmonkyou : | yakuman, with pair of the same colour and closed hand | Kachou Fugetsu : | yakuman | Fuuka Setsugetsu : | yakuman |
| hoka no yaku | 他の役 |
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Seven pairsNo other minipoints are added. | No other minipoints are added. | 25 fu | 25 fu | 25 fu | 25 fu | fu_25 | 25 fu | 25 fu | 25 fu | 25 fu | 25 fu | 25 fu | 25 fu | 50 fuSeven Pairs is 1 han 50 fu, or 2 han in case of mangan and more. | | 25 fu | | | 25 fu | 25 fu | 50 fuSeven Pairs is 1 han 50 fu, or 2 han in case of mangan and more. | | 25 fu | 25 fu | chiitoitsu no fu | 七対子の符 |
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Pinfu yakuScores the minipoints for self-draw in case of winning with a pinfu hand. If yes, the hand does not have the pinfu yaku. | Scores the minipoints for self-draw in case of winning with a pinfu hand. If yes, the hand does not have the pinfu yaku. | | | | | | | | | | | | | | | | | | | | | | | | pinfu tsumo ten | 平和ツモ符 |
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Replacement tileScores the minipoints for self-draw in case of winning on a replacement tile. | Scores the minipoints for self-draw in case of winning on a replacement tile. | | | | 2 fu | | | | | 2 fu | 2 fu | 2 fu | 2 fu | | | | 0 fu | 2 fu | 2 fu | | | | | | rinshan tsumo ten | 嶺上ツモ符 |
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Value honour. | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | | | 2 fu | | | 2 fu | 2 fu | | 2 fu | | 2 fu | iifanpai no toitsu | 一翻牌の対ツ |
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Double wind | 2 fu | 4 fu | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | 2 fu | | | 4 fu | 2 fu | 2 fu | 4 fu | | 2 fu | | 2 fu | renfonpai no toitsu | 連風牌の対ツ |
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Concealed sequence | 0; 0 | 0; 0 | 0; 0 | 0; 0 | 0; 0 | 0; 0 | 0; 0 | 0; 0 | | | | 0; 0 | | | 0; 0 | | | 0; 0 | 0; 0 | | | | 0; 0 | anjun | 暗ジュンツ |
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Melded triplet | 2; 4 | 2; 4 | 2; 4 | 2; 4 | 2; 4 | 2; 4 | 2; 4 | 2; 4 | | | | 2; 4 | | | 2; 4 | | | 2; 4 | 2; 4 | | | | 2; 4 | minkō | 明コーツ |
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Concealed triplet | 4; 8 | 4; 8 | 4; 8 | 4; 8 | 4; 8 | 4; 8 | 4; 8 | 4; 8 | | | | 4; 8 | | | 4; 8 | | | 4; 8 | 4; 8 | | | | 4; 8 | ankô | 暗コーツ |
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Melded quad | 8; 16 | 8; 16 | 8; 16 | 8; 16 | 8; 16 | 8; 16 | 8; 16 | 8; 16 | | | | 8; 16 | | | 8; 16 | | | 8; 16 | 8; 16 | | | | 8; 16 | minkan | 明カン |
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Concealed quad | 16; 32 | 16; 32 | 16; 32 | 16; 32 | 16; 32 | 16; 32 | 16; 32 | 16; 32 | | | | 16; 32 | | | 16; 32 | | | 16; 32 | 16; 32 | | | | 16; 32 | ankan | 暗カン |
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