List of yaku

One han closed only

Yaku	Japanese	Open/Closed
Tsumo	門前清自摸和	Closed only
This yaku may apply to any closed hand. Any player who draws a winning tile with a closed hand is awarded this yaku.

Riichi	立直	Closed only
This is a special yaku applied to closed tenpai hands, which requires the player to make a declaration and "wager".

Ippatasu	一発	Closed only
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	平和	Closed only
Winning tile: or
Typicially known as "all sequences", this is a hand that does not gain fu based on composition, other than that of a closed ron.

Iipeiko	一盃口	Closed only

This hand includes two identical sequences.

Yaku	Japanese	Open/Closed
Haitei raoyue	海底撈月	May be open
The hand is completed with the last tile on the wall.

Houtei raoyui	河底撈魚	May be open
The hand is completed with the very last discarded tile.

Rinshan kaihou	嶺上開花	May be open
This yaku is awarded upon winning with a tile from the dead wall.

Chankan	搶槓
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	断幺九	May be open (Closed only on variation)
Winning tile: or
A hand composed of only inside (numbers 2-8) tiles

Yakuhai	役牌	May be open
Winning tile: or
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.

Yaku	Japanese	Open/Closed

Double riichi	ダブルリーチ	Closed only
Riichi is declared with a dealt hand before the first discard.

Chanta	全帯幺九	May be open (Lose 1 han)

All melds contain at least 1 terminals or honor.

Sanshoku	三色同順	May be open (Lose 1 han)

Three sequences have the same number across the three different suits.

Ittsu	一通貫	May be open (Lose 1 han)

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.

Toi toi	対々	May be open

The entire hand is composed of triplets.

San ankou	三暗刻	May be open

The hand includes 3 ankou.

Sanshoku doukou	三色同刻	May be open

The hand includes three groups of triplets with the same number.

San kantsu	三槓子	May be open

Three kans are called for this hand.

Chii toitsu	七対子	Closed only

This hand is composed of seven pairs. It is one of two exceptions to the standard 4 melds and a pair pattern.

Honrotou	混老頭対々和	May be open

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.

Shousangen	小三元	May be open

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.

Yaku	Japanese	Open/Closed

Honitsu	混一色

This is a single suit hand mixed with some honor tiles.

Junchan	純全帯么

All sets contain at least one terminal.

Ryanpeikou	二盃口	Closed only

This hand has two sets of "iipeiko". This hand does not combine with chii toitsu, even though the hand can be interpreted as one.

This is the only yaku set at 6 han, where the number drops to 5 han when opened.

Chinitsu 「清一色」 hand composed entirely of tiles from only one of the three suits.

Kokushi musou 「国士無双」 hand with one of each of the 13 different terminal and honour tiles plus one extra terminal or honour tile. (For some rules, double yakuman for a 13-wait set)
Chinrotou 「清老頭」 All terminals
Daisangen 「大三元」 A hand with three Pon's or Kan's sets of the three Dragons.
Suu ankou 「四暗刻」 A concealed hand with four concealed Pon's. (Tsumo only and depending on rules, Double Yakuman if win on a pair wait)
Suu kantsu「四槓子」 A hand with four Kan's.
Shousuushi 「小四喜」 A hand with three Pon's/Kan's sets of winds of and a pair of winds.
Daisuushi 「大四喜」 A hand with four Pon's/Kan's of winds. (Double Yakuman, depending on the rules)
Chuuren poutou 「九連宝燈」 A hand consisting of the tiles 1112345678999 in the same suit plus any one extra tile of the same suit.
Ryuu iisou 「緑一色」 A hand composed entirely of green tiles: 2, 3, 4, 6 and 8 Sou and Hatsu.
Tsuu iisou 「字一色」 A hand composed entirely of honour tiles.

This yaku does not specifically deal with a player's hand, but rather the player's discards. By default, this hand is set to mangan.

Nagashi mangan 「流し満貫」 All the discards are terminals or honors. Plus, none of the discards were called pon or chi to form melds.

Renhou 「人和」 A non-dealer player wins on a discard at the first round. Variance may set this to mangan, or not used at all.