List of yaku

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1 Han closed only

  • Tsumo 「門前清自摸和」 You draw a winning tile from the wall.
  • Riichi 「立直」 You declare that you're one tile away from a finished hand. This locks your hand down.
  • Ippatsu 「一発」 This is awarded when you win on the first four turns after declaring Reach. A Pon/Chi/Kan from another player cancels Ippatsu.
  • Pinfu 「平和」 Your hand is composed of 4 Chis and a valueless pair. The winning tile is required to finish a two-sided wait. "The basic hand."
  • Iipeiko 「一盃口」 A hand with two identical Chi's.

1 Han

  • Haitei 「海底撈月」 The hand is completed with the last tile on the wall.
  • Hotei 「河底撈魚」 The hand is completed with another player's last discard.
  • Rinshan Kaihou 「嶺上開花」 The hand is completed 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」 A hand composed of only inside (numbers 2-8) tiles[/spoiler]

2 Han

  • Double Richi 「ダブルリーチ」 Richi declared on the first round. Closed only.
  • Chi Toitsu 「七対子」 Hand with seven different pairs. Closed only.
  • Chanta 「全帯幺九」 All sets contain terminals or honours.
  • Sanshiki / Sanshoku 「三色同順」 A hand with three Chi's of the same numerical sequence, one of each suit.
  • Ittsu 「一通貫」 A hand with a set 1 through 9 of a single suit.
  • Toi Toi 「対々」 All Pons hand.
  • San an kou 「三暗刻」3 Pons concealed
  • Sanshoku Douko 「三色同刻」 Hand with 3 Pons of the same "number".
  • San Kansu 「三槓子」 Hand with three Kans.[/spoiler]

3 Han[/u]

  • Honitsu 「混一色」 Hand with tiles from only one of the three suits, in combination with honours.
  • Ryanpeiko 「二盃口」 Two sets of "Iipeiko". Closed only.
  • Junchan 「純全帯么」 All sets contain at least one terminal.

4 Han

  • Honroto Toiho 「混老頭対々和」 All terminals and honors.
  • Shousangen 「小三元」 The hand contains two sets of 3 dragon tiles and a pair of the third dragon tiles.

These actually count as two. But they're 4 due to the additional yaku of Toi Toi and 2x Yakuhai respectively.

6 Han

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.

Yakuman

  • Kokushi Muso 「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)
  • Chinroto 「清老頭」 All terminals
  • Daisangen 「大三元」 A hand with three Pon's or Kan's sets of the three Dragons.
  • Su Anko 「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)
  • Su Kantsu「四槓子」 A hand with four Kan's.
  • Shosushi 「小四喜」 A hand with three Pon's/Kan's sets of winds of and a pair of winds.
  • Daisushi 「大四喜」 A hand with four Pon's/Kan's of winds. (Double Yakuman, depending on the rules)
  • Churen Poto 「九連宝燈」 A hand consisting of the tiles 1112345678999 in the same suit plus any one extra tile of the same suit.
  • Ryu Iso 「緑一色」 A Hand composed entirely of green tiles: 2, 3, 4, 6 and 8 Sou and Hatsu.
  • Tsu Iso 「字一色」 A hand composed entirely of honour tiles.

First Round Yakuman

  • Tenhou 「天和」 The dealer wins on his first turn.
  • Chihou 「地和」 A non-dealer player wins on a draw tile at the first round.
  • 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.

Special case

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.[/spoiler]