1-Han Yaku

• Menzen Tsumo (Self-draw with closed hand)

  This yaku is awarded when you win by Tsumo (self-draw) without making any open calls such as Pon or Chi.

  

• Riichi (Reach declaration)
  This yaku is established when a player in tenpai declares "Riichi" (Reach).
  If the player wins within one round after declaring Riichi—either by drawing a winning tile themselves (Tsumo) or by someone discarding it before their next turn—they earn the Ippatsu (One-Shot) bonus. 
  
  
• Ippatsu (Win within 1 turn after Riichi, no calls)
  This yaku is awarded if you win within one round after declaring Riichi, without any calls (Pon, Chi, or Kan) being made. The one round includes your next Tsumo turn.However, if any call (Chi, Pon, or Kan) occurs before the win, the Ippatsu bonus is nullified.
  
  
• Tanyao (All simples: 2–8 tiles only)
  The condition for the Tanyao yaku is that your hand contains no terminals (1s and 9s) or honor tiles. Tiles numbered 2 through 8 in the numbered suits are called Tanyao tiles.
  
  
  
  
  
• Pinfu (All sequences, two-sided wait, non-value pair)
  This yaku is valid when the following conditions are met:
  1. All four melds are sequences (shuntsu) made of consecutive numbers.
  2. The pair (head) is not a value/honor tile (i.e., not a dragon, seat wind, or round wind).
  3. The winning tile must complete a two-sided (ryanmen) wait.
  
  
  
  
  
• Iipeikou (Two identical sequences, closed hand only)
  This yaku is completed when you have two identical sequences (shuntsu) of consecutive tiles.
  Iipeikou (Pure Double Sequence) requires a closed hand. Even if you form the necessary tiles, the yaku becomes invalid if you make a call (open meld). Naturally, you cannot win with Iipeikou if the sequences were formed through Chi or Pon.
  
  
  
  
  
• Value Tiles (Yakuhai: Dragons, Seat wind, Round wind)
  Dragons: This yaku is completed when you collect three or more of any of the dragon tiles (white, green, or red).
  Seat wind, Round wind: This yaku is completed when you collect three or more of either the round wind (e.g., East during East round) or your seat wind (determined counterclockwise from the dealer: East, South, West, North).
  
  
  
  
  
• Chankan (Robbing a Kan)
  This yaku is completed when you win off a tile that an opponent uses to declare an added Kan (extending a Pon into a Kan).
  You can win with Robbing a Kan (Chankan) even if you have no other yaku.
  
  
• Rinshan Kaihou (Win from a dead wall draw after Kan)
  This yaku is completed when you win with the Rinshan tile drawn after declaring a Kan.
  You can win with Rinshan Kaihō alone, even without any other yaku.
  
  
  
  
• Haitei (Win with last drawn tile) 
  This yaku is completed when you win by self-drawing the very last tile of the round, known as the Haitei tile.
  
  
• Houtei (Win with last discard)
  This yaku is completed when you win by claiming the last discard of the round, known as the Houtei tile.
  
  

2-Han Yaku

• Double Riichi (Declared on first turn, closed hand)
  
• Chiitoitsu (Seven pairs, closed hand only)
  A pair (toitsu) is a set of two identical tiles. If your hand contains seven pairs, it forms the yaku called Chiitoitsu (Seven Pairs). However, you cannot use four of the same tile in this hand. Chiitoitsu is a good hand to aim for when you start forming multiple pairs.
  
  
  
• Renhou (Seat and Round wind pair melded)
  This yaku is completed when your seat wind and the round wind are the same, and you collect three or more of that wind tile.
  
  
• Toitoi (All triplets/quads)
  While Chiitoitsu (Seven Pairs) consists of seven pairs of matching tiles, Toitoi (All Triplets) is made up of four sets of three identical tiles. This section explains Toitoi. One convenient aspect of Toitoi is that you can use Pon (calls), so you don’t have to complete the hand entirely by yourself.
  
  
• Sanankou (Three concealed triplets)
  

  This yaku is completed when you form three sets of concealed triplets (Ankou) or concealed quads (Ankan) within your hand.

  
• Sanshoku Doukou (Same number triplets in all suits)
  

  This yaku is completed when you form triplets (three of a kind) or quads (four of a kind) of the same number across all three suits: Manzu (Characters), Pinzu (Dots), and Souzu (Bamboo).

  
• Sanshoku Doujun (Same sequence in all suits)
  

  This yaku is completed when you form the same sequence (shuntsu) of consecutive numbers in each of the three suits: Manzu (Characters), Pinzu (Dots), and Souzu (Bamboo).Sanshoku Doujun (Three Colored Straight) is normally worth 2 han, but if you call tiles (open melds), it is reduced to 1 han.

  
• Honroutou (Only terminals and honors)
  

  This yaku is completed by using only terminal and honor tiles (1s, 9s, and honor tiles). There are no restrictions on the hand structure, and it can be completed with open melds, making it combinable with various other yaku. Honroutou (All Terminals and Honors) always combines with either Toitoi (All Triplets) or Chiitoitsu (Seven Pairs). Therefore, while Honroutou itself is worth 2 han, it is always paired with one of those hands, adding their han as well and increasing the potential score.

  
• Ittsuu (123, 456, 789 in same suit)
  This yaku is completed by forming the sequences 123, 456, and 789 within the same suit. The remaining set and pair can be any combination, allowing you to aim for other combinations such as Yakuhai or Honitsu (Half Flush). However, if you call tiles from other players, the yaku is reduced to 1 han (kuisagari).
  
  
• Chanta (All groups contain terminals or honors)
  This yaku is completed when every meld and the pair in your hand contains terminal or honor tiles (1s, 9s, or honor tiles). If the hand includes only 1s and 9s and no honor tiles, it becomes a higher-tier yaku called Junchantaiyaochuu (Pure Outside Hand). Note that Chanta (Mixed Outside Hand) is reduced to 1 han if completed with open melds (kuisagari).
  
  
• Shousangen (Two dragon triplets + one pair)
  

  This yaku is completed by forming two triplets (or quads) and a pair using the three dragon tiles: Haku (White), Hatsu (Green), and Chun (Red). The remaining melds can be any form, making it a relatively easy yaku to aim for if you collect the dragon tiles. It can also be completed with open melds, without any reduction in han.

  
• Sankantsu (Three quads)
  

  This yaku is completed when you form three quads (kantsu), each consisting of four identical tiles.

  

3-Han Yaku

• Honitsu (One suit + honors)
  This yaku is completed by using only one suit of numbered tiles along with honor tiles. Since there are no restrictions on the hand's structure or method of winning, it can easily be combined with various other yaku, making it highly versatile. It can also be completed with calls (Chi or Pon), making it beginner-friendly. If the hand is completed using open melds, the yaku is reduced to 2 han (kuisagari).
  
  
• Junchan (All groups use terminals)
  

  This yaku is completed when every meld and the pair in your hand includes terminal tiles (1s and 9s only). Unlike its lower counterpart Chanta (Mixed Outside Hand), Junchan (Pure Outside Hand) does not allow the use of honor tiles. If completed using open melds (calls from other players), the yaku is reduced to 2 han (kuisagari).

  
• Ryanpeikou (Two Iipeikou, closed hand only)
  This yaku is achieved by forming two Iipeikou (Pure Double Sequences), meaning you need two sets of identical sequences with the same suit and numbers. The pair can be either a numbered tile or an honor tile. As with Iipeikou, this yaku requires a closed hand and becomes invalid if any calls (melds) are made.
  
  

4Han Yaku

• Nagashi Mangan (All discards are terminals/honors, not called)
  This yaku is awarded at an exhaustive draw (ryuukyoku) if all of your discards consist only of terminal and honor tiles (yaochuu-hai). However, if even one of your discarded tiles is called (melded) by another player, the yaku becomes invalid.
  

6Han Yaku

• Chinitsu (One suit only)
  This yaku is completed by using only one suit—Manzu, Pinzu, or Souzu—to form your entire hand. You may call tiles (melds) from other players without invalidating the yaku. If the hand is completed with open melds, it is reduced to 5 han (kuisagari), but it still guarantees a mangan or higher score for both dealer and non-dealer, making it a very powerful hand.
  
  

Yakuman (Limit Hands)

• Tenhou (Heavenly Hand)
  This yakuman occurs only when you are the dealer and your starting hand (initial 13 tiles) is already in a winning shape. There are no restrictions on the tile combinations. Note that if you declare a concealed kan (ankan) on your first turn and win with the supplementary tile (rinshanpai), it does not count as Tenhou (Heavenly Hand).
  
  
• Chiihou (Earthly Hand)
  Chiihou (Earthly Hand) is a yakuman that can occur only when you are a non-dealer. It is achieved if you are in tenpai (ready hand) from the initial deal and win on your very first draw. However, if another player calls a tile (e.g., pon or chi) before your first draw, the yaku becomes invalid. There are no restrictions on the combinations of melds or the pair.
  
  
• Ryuuiisou (All green tiles)
  This yakuman is formed using only green-colored tiles: a specific subset of Souzu (bamboo suit) and the honor tile Hatsu (green). The six tiles allowed are: 2-Sou, 3-Sou, 4-Sou, 6-Sou, 8-Sou, and Hatsu. The hand must consist entirely of these tiles to complete four melds and a pair. Melds can be open or closed—calling tiles from other players is allowed.
  
  
• Daisangen (Big Three Dragons)
  This yakuman is completed by forming a triplet (koutsu) or a quad (kan) of each of the three dragon tiles: White (Haku), Green (Hatsu), and Red (Chun). The remaining meld and the pair can be of any form, and open calls (melds) are allowed—so the hand may be completed even if tiles are called from other players.
  
  
• Shousuushii (Little Four Winds)
  

  This yakuman is completed by forming three melds (triplets or quads) and one pair using the four wind tiles: East, South, West, and North. It can be achieved even with open calls, but since wind tiles are commonly discarded early in the game, it’s difficult to aim for unless you have multiple wind pairs from the initial deal.

  
• Daishii (Big Four Winds)
  This yakuman is completed by forming melds (triplets or quads) of all four wind tiles: East, South, West, and North. It is the superior form of the yakuman "Shō Suushii" (Small Four Winds) and is even more difficult to achieve. Although its occurrence rate is extremely low, it can still be completed using open calls. If your starting hand includes multiple pairs or triplets of honor tiles, it might be worth aiming for.
  
  
• Tsuuiisou (All honors)
  

  This yakuman is achieved by forming a complete hand using only the seven honor tiles: East, South, West, North, White Dragon, Green Dragon, and Red Dragon. It can be completed with open calls, so if your initial hand includes several pairs or triplets of honor tiles, it’s a viable hand to aim for.

  
• Kokushi Musou (Thirteen orphans)
  This unique yakuman, known as Kokushi Musou (Thirteen Orphans), is completed by collecting one of each terminal and honor tile (1 and 9 of each suit, plus all seven honor tiles) and forming a pair with one of them. Since only one of each tile is needed (except for the pair), it can be a relatively accessible yakuman if your starting hand contains many terminal and honor tiles. Due to its special structure, calling tiles (pon, chi, kan) is not allowed when going for Kokushi Musou.
  
  
• Chuuren Poutou (Nine Gates)
  

  This rare yakuman, called Chuuren Poutou (Nine Gates), is completed by forming the exact tile pattern “1112345678999 + any one tile” using only one suit (Manzu, Pinzu, or Souzu). The hand must be fully concealed (closed), with no open melds. Due to its strict tile composition and concealment requirement, it is considered one of the most difficult yakuman to achieve—alongside hands like Suu Kantsu (Four Quads) and Tenhou (Heavenly Hand).

  
• Suuankou (Four concealed triplets)
  This yakuman, Suu Ankou (Four Concealed Triplets), is completed by forming four concealed triplets (ankou), meaning all three identical tiles in each set must come from your own hand. Since it must be a closed hand, you cannot make any calls such as pon, chi, or kan from other players. However, declaring an ankan (concealed kan) from your own hand is allowed, as it still counts as a triplet.
  
  
• Chinroutou (All terminals)
  This yakuman, Chinroutou (All Terminals), is completed by using only terminal number tiles—1s and 9s from any suit. All melds must be triplets or quads, and you are allowed to make open calls from other players. However, if you complete it as a closed hand without calling, it can also qualify for the Suu Ankou (Four Concealed Triplets) yakuman, making it possible to stack the two yakuman together.
  
  
• Suukantsu (Four quads)
  

  This yakuman, Suu Kantsu (Four Quads), is achieved by forming four quads (kantsu) in a single hand. It is considered one of the most difficult yakuman to complete, and in four-player mahjong, it is extremely rare to witness such a hand.