List of yaku: Difference between revisions
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[[Image:YakuListed.png|thumb|right|300px|[http://tenhou.net/0/?log=2008121721gm-00c1-0000-fcadb0d7&tw=3&ts=5 Example hand], containing many yaku.]] | [[Image:YakuListed.png|thumb|right|300px|[http://tenhou.net/0/?log=2008121721gm-00c1-0000-fcadb0d7&tw=3&ts=5 Example hand], containing many yaku.]] | ||
A '''[[yaku]]''' is a certain pattern in a mahjong hand, or a special condition under which a win is declared. | A '''[[yaku]]''' {{kana|役}} is a certain pattern in a mahjong hand, or a special condition under which a win is declared. Many yaku are pattern-based yaku comparable to "poker hands". Unlike poker, yaku types do not supercede each other. Instead, they are the main factor to determine hand values. Players must finish hands before others do; and each yaku has [[han|specific values]] attached to them to determine [[Scoring table|payment amounts]]. | ||
The yaku and their values are essential for [[scoring]]. The game rules define lots of different yaku, worth a different amount of [[han]] based on their difficulty. A player can incorporate [[Yaku | The yaku and their values are essential for [[scoring]]. The game rules define lots of different yaku, worth a different amount of '''[[han]]''' {{kana|飜}} based on their difficulty or pre-assigned value. A player can incorporate [[Yaku compatibility|several different yaku in the same hand]] and accumulate their han values for high-scoring hands. For additional scoring, the game also features [[dora]]. However, possession of dora are not considered as yaku, even though they provide han. | ||
'''In order to win any hand in this game, a player requires at least one yaku.''' A hand having no yaku may not win, even if it has multiple dora. Declaring a win on a yakuless hand may result in [[chombo]]. So, as an early part of the game's learning process, it is essential to learn the different yaku listed here and eventually their han values. | |||
The most important yaku to learn is [[riichi]], since it is very common and a very easy yaku to achieve. A new player may find it easiest to avoid opening their hand and simply aim for riichi every time; no other yaku is required to win the hand. However, this strategy is far too simple for serious play and an experienced player should generally aim for a high-scoring yaku or combination of yaku from the beginning of the hand. | |||
==One han closed only== | ==One han closed only== | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Menzenchin tsumohou|Menzen tsumo | ||
| kanji = 門前清自摸和 | | kanji = 門前清自摸和 | ||
| closeopen = Closed only | | closeopen = Closed only | ||
Line 12: | Line 16: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Riichi | ||
| kanji = 立直 | | kanji = 立直 | ||
| closeopen = Closed only | | closeopen = Closed only | ||
Line 18: | Line 22: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Ippatsu | ||
| kanji = 一発 | | kanji = 一発 | ||
| closeopen = Closed only | | closeopen = Closed only | ||
Line 24: | Line 28: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Pinfu | ||
| kanji = 平和 | | kanji = 平和 | ||
| closeopen = Closed only | | closeopen = Closed only | ||
Line 31: | Line 35: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Iipeikou | ||
| kanji = 一盃口 | | kanji = 一盃口 | ||
| closeopen = Closed only | | closeopen = Closed only | ||
Line 40: | Line 44: | ||
==One han== | ==One han== | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname =Haitei raoyue | ||
| kanji = 海底撈月 | | kanji = 海底撈月 | ||
| closeopen = May be open | | closeopen = May be open | ||
Line 46: | Line 50: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Houtei raoyui | ||
| kanji = 河底撈魚 | | kanji = 河底撈魚 | ||
| closeopen = May be open | | closeopen = May be open | ||
Line 52: | Line 56: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Rinshan kaihou | ||
| kanji = 嶺上開花 | | kanji = 嶺上開花 | ||
| closeopen = May be open | | closeopen = May be open | ||
Line 58: | Line 62: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Chankan | ||
| kanji = 搶槓 | | kanji = 搶槓 | ||
| closeopen = May be open | | closeopen = May be open | ||
Line 64: | Line 68: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Tanyao | ||
| kanji = 断幺九 | | kanji = 断幺九 | ||
| closeopen = May be open (Closed only on variation) | | closeopen = May be open (Closed only on variation) | ||
Line 71: | Line 75: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Yakuhai | ||
| kanji = 役牌 | | kanji = 役牌 | ||
| closeopen = May be open | | closeopen = May be open | ||
Line 80: | Line 84: | ||
==Two han== | ==Two han== | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Double riichi | ||
| kanji = | | kanji = 両立直 | ||
| closeopen = Closed only | | closeopen = Closed only | ||
| description = Riichi is declared with a dealt hand before the first discard. | | description = Riichi is declared with a dealt hand before the first discard. | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Chantaiyao|Chanta | ||
| kanji = 全帯幺九 | | kanji = 全帯幺九 | ||
| closeopen = May be open (Loses 1 han) | | closeopen = May be open (Loses 1 han) | ||
| tilepattern = {{#mjt:11m789p123s22z}} {{#mjt:2'13p}} Agari: {{#mjt:1m}} or {{#mjt:2z}} | | tilepattern = {{#mjt:11m789p123s22z}} {{#mjt:2'13p}} Agari: {{#mjt:1m}} or {{#mjt:2z}} | ||
| description = All | | description = All tile groups contain at least 1 [[terminal]] or [[honor]]. | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Sanshoku doujun|Sanshoku | ||
| kanji = 三色同順 | | kanji = 三色同順 | ||
| closeopen = May be open (Loses 1 han) | | closeopen = May be open (Loses 1 han) | ||
Line 100: | Line 104: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Ittsu | ||
| kanji = | | kanji = 一気通貫 | ||
| closeopen = May be open (Loses 1 han) | | closeopen = May be open (Loses 1 han) | ||
| tilepattern = {{#mjt:123456789m00000z}} | | tilepattern = {{#mjt:123456789m00000z}} | ||
Line 107: | Line 111: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Toitoi | ||
| kanji = 対々 | | kanji = 対々 | ||
| closeopen = May be open | | closeopen = May be open | ||
Line 114: | Line 118: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Sanankou | ||
| kanji = 三暗刻 | | kanji = 三暗刻 | ||
| closeopen = May be open | | closeopen = May be open | ||
| tilepattern = {{#mjt:666m2388p444s444z}} Agari: {{#mjt:1p}} or {{#mjt:4p}} | | tilepattern = {{#mjt:666m2388p444s444z}} Agari: {{#mjt:1p}} or {{#mjt:4p}} | ||
| description = The hand includes three | | description = The hand includes three groups of triplets (or closed quads) that have been formed without calling any tiles. The fourth group can be an open triplet or sequence. | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Sanshoku doukou | ||
| kanji = 三色同刻 | | kanji = 三色同刻 | ||
| closeopen = May be open | | closeopen = May be open | ||
Line 129: | Line 133: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Sankantsu | ||
| kanji = 三槓子 | | kanji = 三槓子 | ||
| closeopen = May be open | | closeopen = May be open | ||
| tilepattern = {{#mjt:456m2s}} {{#mjt:6' | | tilepattern = {{#mjt:456m2s}} {{#mjt:6'666p999'9s0z55s0z}} Agari: {{#mjt:2s}} | ||
| description = Three kans are called for this hand. | | description = Three kans are called for this hand. | ||
}} | }} | ||
{{yaku list | yakuname = | {{yaku list | ||
| yakuname = Chiitoitsu | |||
| kanji = 七対子 | | kanji = 七対子 | ||
| closeopen = Closed only | | closeopen = Closed only | ||
| tilepattern = {{#mjt:1177p33z55m2z44s55z}} Agari: {{#mjt:2z}} | | tilepattern = {{#mjt:1177p33z55m2z44s55z}} Agari: {{#mjt:2z}} | ||
| description = This hand is composed of seven pairs. It is one of two exceptions to the standard 4 | | description = This hand is composed of seven pairs. It is one of two exceptions to the standard 4 tile groups and a pair pattern. | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Honroutou | ||
| kanji = 混老頭 | | kanji = 混老頭 | ||
| closeopen = May be open (Consider as 4 han †) | | closeopen = May be open (Consider as 4 han †) | ||
| tilepattern = {{#mjt: | | tilepattern = {{#mjt:11199m22z}} {{#mjt:999's44'4z}} Agari: {{#mjt:9m}} or {{#mjt:2z}} | ||
| description = The hand is composed of nothing but all terminals and honors.<br>† This hand may be considered as 4 han, because it is impossible to score this hand without either chii toitsu or toi toi. | | description = The hand is composed of nothing but all terminals and honors.<br>† This hand may be considered as 4 han, because it is impossible to score this hand without either chii toitsu or toi toi. | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Shousangen | ||
| kanji = 小三元 | | kanji = 小三元 | ||
| closeopen = May be open (Consider as 4 han †) | | closeopen = May be open (Consider as 4 han †) | ||
Line 158: | Line 163: | ||
==Three han== | ==Three han== | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Honitsu | ||
| kanji = 混一色 | | kanji = 混一色 | ||
| closeopen = May be open (Loses 1 han) | | closeopen = May be open (Loses 1 han) | ||
Line 165: | Line 170: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Junchan taiyao|Junchan | ||
| kanji = 純全帯么 | | kanji = 純全帯么 | ||
| closeopen = May be open (Loses 1 han) | | closeopen = May be open (Loses 1 han) | ||
Line 172: | Line 177: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Ryanpeikou | ||
| kanji = 二盃口 | | kanji = 二盃口 | ||
| closeopen = Closed only | | closeopen = Closed only | ||
Line 181: | Line 186: | ||
==Six han== | ==Six han== | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Chinitsu | ||
| kanji = 清一色 | | kanji = 清一色 | ||
| closeopen = May be open (Loses 1 han) | | closeopen = May be open (Loses 1 han) | ||
Line 190: | Line 195: | ||
==Yakuman== | ==Yakuman== | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Kazoe yakuman | ||
| kanji = 数え役満 | | kanji = 数え役満 | ||
| closeopen = May be open | | closeopen = May be open | ||
Line 196: | Line 201: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Kokushi musou | ||
| kanji = 国士無双 or 国士無双13面待ち | | kanji = 国士無双 or 国士無双13面待ち | ||
| closeopen = Closed only | | closeopen = Closed only | ||
Line 203: | Line 208: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Suuankou | ||
| kanji = 四暗刻 or 四暗刻単騎 | | kanji = 四暗刻 or 四暗刻単騎 | ||
| closeopen = Closed only | | closeopen = Closed only | ||
| tilepattern = {{#mjt:222m444p888m7722z}} Tsumo: {{#mjt:7z}} or {{#mjt:2z}} | | tilepattern = {{#mjt:222m444p888m7722z}} Tsumo: {{#mjt:7z}} or {{#mjt:2z}} | ||
| description = This hand is composed of four | | description = This hand is composed of four groups of closed triplets. When this hand has a [[shanpon]] pattern and the win is via ron, then it would not be counted as such; only as the lesser [[toitoi]] with [[sanankou]]. | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Daisangen | ||
| kanji = 大三元 | | kanji = 大三元 | ||
| closeopen = May be open | | closeopen = May be open | ||
| tilepattern = {{#mjt:345m2s555777z}} {{#mjt:6'66z}} Agari: {{#mjt:2s}} | | tilepattern = {{#mjt:345m2s555777z}} {{#mjt:6'66z}} Agari: {{#mjt:2s}} | ||
| description = This | | description = This hand possesses three groups (triplets or quads) of all the dragons. | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Shousuushii | ||
| kanji = 小四喜 | | kanji = 小四喜 | ||
| closeopen = May be open | | closeopen = May be open | ||
| tilepattern = {{#mjt:888m1222z}} {{#mjt:33'3z}} {{#mjt:444'z}} Agari: {{#mjt:1z}} | | tilepattern = {{#mjt:888m1222z}} {{#mjt:33'3z}} {{#mjt:444'z}} Agari: {{#mjt:1z}} | ||
| description = This hand has three groups of the wind tiles plus a pair of the fourth kind. | | description = This hand has three groups (triplets or quads) of the wind tiles plus a pair of the fourth kind. | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Daisuushii | ||
| kanji = 大四喜 | | kanji = 大四喜 | ||
| closeopen = May be open | | closeopen = May be open | ||
| tilepattern = {{#mjt:5p111222444z}} {{#mjt:33'3z}} Agari: {{#mjt:5p}} | | tilepattern = {{#mjt:5p111222444z}} {{#mjt:33'3z}} Agari: {{#mjt:5p}} | ||
| description = This hand has four groups of all four wind tiles. | | description = This hand has four groups (triplets or quads) of all four wind tiles. | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Tsuuiisou | ||
| kanji = 字一色 | | kanji = 字一色 | ||
| closeopen = May be open | | closeopen = May be open | ||
Line 238: | Line 243: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Chinroutou | ||
| kanji = 清老頭 | | kanji = 清老頭 | ||
| closeopen = May be open | | closeopen = May be open | ||
Line 245: | Line 250: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Ryuuiisou | ||
| kanji = 緑一色 | | kanji = 緑一色 | ||
| closeopen = May be open | | closeopen = May be open | ||
Line 252: | Line 257: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Chuuren poutou | ||
| kanji = 九連宝燈 or 純正九蓮宝燈 | | kanji = 九連宝燈 or 純正九蓮宝燈 | ||
| closeopen = Closed only | | closeopen = Closed only | ||
Line 259: | Line 264: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Suukantsu | ||
| kanji = 四槓子 | | kanji = 四槓子 | ||
| closeopen = May be open | | closeopen = May be open | ||
| tilepattern = {{#mjt:4z}} {{#mjt: | | tilepattern = {{#mjt:4z}} {{#mjt:66"6p222'2m0770z4444's}} Agari: {{#mjt:4z}} | ||
| description = | | description = Any hand with four calls of kan. | ||
}} | }} | ||
===Initial yakuman=== | ===Initial yakuman=== | ||
{{yaku list | yakuname = | {{yaku list | ||
| yakuname = Tenhou | |||
| kanji = 天和 | | kanji = 天和 | ||
| closeopen = Closed only | | closeopen = Closed only | ||
Line 273: | Line 279: | ||
}} | }} | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Chiihou | ||
| kanji = 地和 | | kanji = 地和 | ||
| closeopen = Closed only | | closeopen = Closed only | ||
| description = The non-dealer hand is a winning hand | | description = The non-dealer hand is a winning hand with the first tile draw. | ||
}} | }} | ||
Line 283: | Line 289: | ||
{{yaku list | {{yaku list | ||
| yakuname = | | yakuname = Nagashi mangan | ||
| kanji = 流し満貫 | | kanji = 流し満貫 | ||
| closeopen = Closed only | | closeopen = Closed only | ||
Line 307: | Line 313: | ||
[[Category:Yaku]] | [[Category:Yaku]] | ||
[[Category:Scoring]] | |||
{{Navbox yaku}} | {{Navbox yaku}} |
Revision as of 20:58, 17 July 2020
A yaku 「役」 is a certain pattern in a mahjong hand, or a special condition under which a win is declared. Many yaku are pattern-based yaku comparable to "poker hands". Unlike poker, yaku types do not supercede each other. Instead, they are the main factor to determine hand values. Players must finish hands before others do; and each yaku has specific values attached to them to determine payment amounts.
The yaku and their values are essential for scoring. The game rules define lots of different yaku, worth a different amount of han 「飜」 based on their difficulty or pre-assigned value. A player can incorporate several different yaku in the same hand and accumulate their han values for high-scoring hands. For additional scoring, the game also features dora. However, possession of dora are not considered as yaku, even though they provide han.
In order to win any hand in this game, a player requires at least one yaku. A hand having no yaku may not win, even if it has multiple dora. Declaring a win on a yakuless hand may result in chombo. So, as an early part of the game's learning process, it is essential to learn the different yaku listed here and eventually their han values.
The most important yaku to learn is riichi, since it is very common and a very easy yaku to achieve. A new player may find it easiest to avoid opening their hand and simply aim for riichi every time; no other yaku is required to win the hand. However, this strategy is far too simple for serious play and an experienced player should generally aim for a high-scoring yaku or combination of yaku from the beginning of the hand.
One han closed only
Menzenchin tsumohou
|
This yaku may apply to any closed hand. Any player who draws a winning tile with a closed hand is awarded this yaku. | |
Riichi
|
This is a special yaku applied to closed tenpai hands, which requires the player to make a declaration and "wager". | |
Ippatsu
|
This is applied when the player calling riichi wins within 4 tile draws/discards. In addition, the cycle must not be interrupted by tile calls. | |
Pinfu
|
Typically known as "all sequences", this is a hand that does not gain fu based on composition, other than that of a closed ron. | |
Agari: or |
Iipeikou
|
This hand includes two identical sequences. | |
One han
Haitei raoyue
|
The hand is completed with the last tile on the wall. | |
Houtei raoyui
|
The hand is completed with the very last discarded tile. | |
Rinshan kaihou
|
This yaku is awarded upon winning with a tile from the dead wall. | |
Chankan
|
The winning tile for a hand is called on another player's Kan. Essentially, the tile needed to complete a Kan is stolen to complete a winning hand. | |
Tanyao
|
A hand composed of only inside (numbers 2-8) tiles | |
Agari: or |
Yakuhai
|
A hand with at least one group of dragon tiles, seat wind, or round wind tiles. This hand can be valued at 1 han for each group. | |
Agari: or |
Two han
Double riichi
|
Riichi is declared with a dealt hand before the first discard. | |
Chantaiyao
|
All tile groups contain at least 1 terminal or honor. | |
Agari: or |
Sanshoku doujun
|
Three sequences have the same number across the three different suits. | |
Agari: |
Ittsu
|
This hand has a complete sequence of 1 through 9 of a single suit. As a note, the sequence of 1-9 are actually three groups of sequences numbered 123, 456, and 789. | |
Toitoi
|
The entire hand is composed of triplets. | |
Agari: or |
Sanankou
|
The hand includes three groups of triplets (or closed quads) that have been formed without calling any tiles. The fourth group can be an open triplet or sequence. | |
Agari: or |
Sanshoku doukou
|
The hand includes three groups of triplets with the same number. | |
Agari: |
Sankantsu
|
Three kans are called for this hand. | |
Agari: |
Chiitoitsu
|
This hand is composed of seven pairs. It is one of two exceptions to the standard 4 tile groups and a pair pattern. | |
Agari: |
Honroutou
|
The hand is composed of nothing but all terminals and honors. † This hand may be considered as 4 han, because it is impossible to score this hand without either chii toitsu or toi toi. | |
Agari: or |
Shousangen
|
The hand contains two sets of 3 dragon tiles and a pair of the third dragon tiles. † This hand may be considered as 4 han, because it is impossible to score this hand without two sets of yakuhai, from the two sets of dragons. | |
Agari: or |
Three han
Honitsu
|
This is a single suit hand mixed with some honor tiles. | |
Agari: or |
Junchan taiyao
|
All sets contain at least one terminal. | |
Agari: |
Ryanpeikou
|
This hand has two sets of "iipeikou". This hand does not combine with chii toitsu, even though the hand can be interpreted as one. | |
Agari: |
Six han
Chinitsu
|
This hand is composed entirely of tiles from only one of the three suits. It is the only yaku set at 6 han, where the number drops to 5 han when opened. | |
Agari: or |
Yakuman
Kazoe yakuman
|
This is a special class of yakuman, where a hand is composed of 13+ han based on the combination of above regular yaku and/or dora. | |
Kokushi musou
|
This hand has one of each of the 13 different terminal and honor tiles plus one extra terminal or honour tile. Some rules may allow double yakuman for a 13-wait set. | |
Agari: |
Suuankou
|
This hand is composed of four groups of closed triplets. When this hand has a shanpon pattern and the win is via ron, then it would not be counted as such; only as the lesser toitoi with sanankou. | |
Tsumo: or |
Daisangen
|
This hand possesses three groups (triplets or quads) of all the dragons. | |
Agari: |
Shousuushii
|
This hand has three groups (triplets or quads) of the wind tiles plus a pair of the fourth kind. | |
Agari: |
Daisuushii
|
This hand has four groups (triplets or quads) of all four wind tiles. | |
Agari: |
Tsuuiisou
|
Every group of tiles are composed of honor tiles. | |
Agari: or |
Chinroutou
|
Every group of tiles are composed of terminal tiles. | |
Agari: or |
Ryuuiisou
|
A hand composed entirely of green tiles: 2, 3, 4, 6 and 8 Sou and/or Hatsu. | |
Agari: or |
Chuuren poutou
|
A hand consisting of the tiles 1112345678999 in the same suit plus any one extra tile of the same suit. | |
Agari: Any manzu. |
Suukantsu
|
Any hand with four calls of kan. | |
Agari: |
Initial yakuman
Tenhou
|
The dealer hand is a winning hand even before discarding a tile. | |
Chiihou
|
The non-dealer hand is a winning hand with the first tile draw. | |
Special case
This yaku does not specifically deal with a player's hand, but rather the player's discards. In addition, the hand may or may not be at tenpai upon scoring. By default, this hand is set to mangan.
Nagashi mangan
|
All the discards are terminals and/or honors. In addition, none of these discards were called by other players. | |
Optional
The above list is generally considered as the "standard yaku", including the yakuman. However, the game offers an even larger array of tile patterns. Various house rules may opt to use some of these yaku on their own.
External links
- List of yaku in Japanese Wikipedia
- Yaku frequency among Tenhou.net players (Japanese)
- Lists all the yaku occurrences in Tenhou.net by percentages and by room
- Pointing out which yaku to learn first
- Yaku list from Ron2
- Yaku list in Wikipedia.
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