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Mahjong Yaku List.

1-han Yaku

Riichi(Ready Hand Declaration)

Place a Riichi stick (1,000-point stick) as a deposit in the center of the table.

If your hand is one tile away from completion (Tenpai), you can declare "Riichi" by placing a 1,000-point stick on the table. This marks your hand as ready.

Ippatsu(One-Shot Win)

If you declare Riichi and win within one turn of discards (a complete round of player actions), you complete the One-Shot Win. It is purely by chance and cannot be deliberately targeted.

Menzen Tsumo(Concealed Self-Draw)

This hand is achieved when you win with a self-drawn tile (Tsumo) while your hand remains closed (without calling).

Yakuhai(Value Tiles)

This hand is achieved when you collect a set (Pon or Kan) of one of the three dragon tiles, your seat wind, or the prevailing wind. Each set gives you 1 Han.

Tanyao(All Simples)

This yaku is formed by completing your hand without using any terminals (1s and 9s) or honor tiles. Your hand consists only of number tiles from 2 to 8.

Pinfu(All Sequences Hand)

This role is achieved if all of the following conditions are met:

• Your hand remains closed (Menzen).
• All sets are sequences (Shuntsu).
• Your pair is not a value tile (Yakuhai).
• You are waiting for two-sided sequences (Ryanmen wait).

Iipeikou(Twin Sequences)

This hand is achieved when you have two identical sequences of the same suit and number.

Haitei Raoyue(Last Tile Draw)

This Yaku is achieved by drawing and winning with the very last tile in the wall (Haitei tile).

Houtei Raoyui(Last Discard Win)

This Yaku is achieved when you win by declaring Ron on the last discarded tile (Houtei tile), which was discarded by the player who drew the Haitei tile.

Rinshan Kaihou(After Kan Draw)

This Yaku is achieved when you win by drawing the supplement tile from the dead wall after declaring a Kan. It works for both open Kan and closed Kan. However, if someone declares Ron on the tile used for the Kan (Chan-Kan), Rinshan Kaihou is not valid.

Chan-Kan(Robbing a Kan)

This Yaku is achieved when you win by declaring Ron on the tile that was added to an open set to declare a Kan. (Note: An open Kan occurs when a player adds a fourth tile to an already open triplet.)

2-han Yaku

Double Riichi(First-Turn Riichi)

This Yaku is achieved by declaring Riichi on the first discard of the game. It is invalid if any open calls (Pon, Chi, or open Kan) are made before the Riichi.

Sanshoku Doujun(Three-Suited Straight)

This Yaku is achieved by forming the same sequence (Shuntsu) in all three suits: Manzu, Pinzu, and Souzu.

Sanshoku Doukou(Three-Suited Triplets)

This Yaku is achieved by forming triplets (Koutsu) of the same number in all three suits: Manzu, Pinzu, and Souzu. If all three triplets are closed (Ankou), it combines with the San Ankou Yaku.

San Ankou(Three Concealed Triplets)

This Yaku is achieved by having three concealed triplets (Ankou). However, if you complete the third triplet by Ron, it becomes an open triplet (Mingkou), and the Yaku is not valid. You are allowed to have one open set in your hand.

Ikkitsuukan(Full Straight)

This Yaku is achieved by forming a straight from 1 to 9 (e.g., 123, 456, 789) in one suit, either Manzu, Pinzu, or Souzu.

Chiitoitsu(Seven Pairs)

This Yaku is achieved by forming seven pairs (Toitsu). Typically, if you have four of the same tile, it does not count as two pairs, so Chiitoitsu cannot be formed.

Toitoi(All Triplets)

This Yaku is achieved by forming four triplets (Koutsu). Both open and closed triplets are valid. However, if all triplets are closed, the hand becomes a Yakuman (Four Concealed Triplets).

Honchantaiyaochuu(Mixed Outside Hand)

This Yaku is achieved when every set and the pair in your hand includes either a terminal (1 or 9) or an honor tile.

San Kantsu(Three Kans)

This Yaku is achieved by making three Kans. It doesn't matter whether the Kans are open or closed.

Shousangen(Little Three Dragons)

This Yaku is achieved by forming a pair of one dragon tile and triplets (or Kans) of the other two dragon tiles. This Yaku always results in at least 4 Han because it combines with the Yakuhai (Value Tiles) Yaku.

Honroutou(All Terminals and Honors)

This Yaku is achieved by forming all sets and the pair using only terminal tiles (1 or 9) and honor tiles. This hand must also combine with Toitoi (All Triplets) or Chiitoitsu (Seven Pairs). If the hand is closed, it can also combine with San Ankou (Three Concealed Triplets).

3-han Yaku

Ryanpeikou(Two Identical Sequences)

Form two identical sets of sequences using the same type of tiles. It is essentially two Iipeikou (One Identical Sequence).

Junchan(Pure Outside Hand)

Include terminals (1 or 9) in every set and the pair.

Honitsu(Half Flush)

Construct the hand using one suit (Manzu, Pinzu, or Souzu) and honor tiles.

6 Han Yaku

Chinitsu(Full Flush)

Form the hand entirely with tiles from one suit (Manzu, Pinzu, or Souzu).

Yakuman

Yakuman is the highest-scoring hand in Mahjong! No matter which Yakuman hand, the points are always the same.

Suuankou(Four Concealed Triplets)

Complete the hand with four sets of triplets, all concealed. ※Winning on a single wait for the pair may count as a Double Yakuman (house rule).

Daisangen(Big Three Dragons)

Complete the hand with all three dragon triplets (White, Green, and Red).

Kokushi Musou(Thirteen Orphans)

Complete the hand with one of each terminal and honor tile, and one pair of any of these tiles.

Ryuuiisou(All Green)

Complete the hand using only the "green" tiles, which are 2, 3, 4, 6, 8 of bamboo, and the Green Dragon tile.

Tsuuiisou(All Honors)

Complete the hand using only honor tiles, which consist of dragon and wind tiles.

Chinroutou(All Terminals)

Complete all the melds and the pair with only terminal tiles (1 and 9).

Suu Kantsu(Four Kongs)

Complete all four melds with kongs (kans), which can be either closed or open kongs. ※ Due to the difficulty, some rules treat this as a Double Yakuman.

Shosushi(Little Four Winds)

Complete the hand with three wind triplets and one pair of a wind tile. This hand is considered a Little Four Winds.

Daisushi(Big Four Winds)

Complete all the melds using wind tiles (East, South, West, North). Having a pair of one wind and triplets of the other three counts as Big Four Winds.

Chuuren Poutou(Nine Gates)

Create the pattern [111 2345678 999 + X] using one suit (Manzu, Pinzu, or Souzu). X can be any tile. If won with a 9-sided wait, this is considered a "Pure Nine Gates," often treated as a double Yakuman.

Chiho(Earthly Hand)

If the player is the non-dealer and is already in tenpai with their starting hand of 13 tiles, and completes their hand with the first draw, the hand is considered an Earthly Hand. Only 4 melds and 1 pair pattern is allowed.

Tenhou(Heavenly Hand)

Win with the initial 14 tiles that are dealt to you as the dealer, without drawing any tiles. This hand is considered a Heavenly Hand.