Riichi, WRC 2025 scoring

Riichi Mahjong is a four-player game. Players draw and discard tiles until a legal win or an exhaustive draw.

This profile follows WRC 2025 hand scoring and settlement. It does not run a full hanchan.

Companion derives yaku, han, fu, dora, limits, and named yakuman from the confirmed hand and explicit win context.

1. Deal 14 tiles to East and 13 tiles to each other player.
2. East discards one tile to start the hand.
3. On each turn, draw one tile and discard one tile.
4. Call chi, pon, or kan when the rules allow it.
5. Declare riichi only with a closed hand that is in tenpai.
6. End the hand when a player wins or the wall has no draw.

• Make a supported standard hand, Seven Pairs, or Thirteen Orphans.
• Include at least one yaku. Dora and red fives do not satisfy this requirement.
• Use a standard four-group hand, Seven Pairs, or Thirteen Orphans.
• Win by tsumo from your draw or ron from another player's discard.
• Companion detects supported named yakuman and adds separate yakuman patterns.

The WRC 2025 source lists the yaku below. Companion detects supported yaku, counts bonuses, calculates fu, and applies the limit table.

One han

Riichi patterns worth one han

Pattern	Pattern value	Condition
Riichi	1 han	Declare riichi with a closed hand and win.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters
Ippatsu	1 han	Win before the next discard after riichi, with no call or quad declaration. Closed hand only.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters
Fully concealed hand (Menzen tsumo)	1 han	Win by self-draw with a closed hand.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters
Pinfu	1 han	Closed hand with four sequences, a non-value pair, and a two-sided sequence wait.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters, 4 of characters, 5 of characters, 6 of characters, 7 of characters, 8 of characters, 9 of characters, 1 of circles, 2 of circles, 3 of circles, 5 of bamboo, 5 of bamboo
Twin sequences (Iipeikou)	1 han	Two identical sequences in one suit. Closed hand only.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters, 1 of characters, 2 of characters, 3 of characters
All inside (Tanyao)	1 han	The hand contains only suit tiles numbered 2 through 8. Open and closed hands qualify.
Example tiles Example tiles: 2 of characters, 3 of characters, 4 of characters, 5 of characters, 6 of characters, 7 of characters, 3 of circles, 4 of circles, 5 of circles, 6 of bamboo, 7 of bamboo, 8 of bamboo, 5 of characters, 5 of characters
Value honor (Yakuhai)	1 han	A triplet or quad of dragons, the seat wind, or the round wind. Matching seat and round winds count twice.
Example tiles Example tiles: Red dragon, Red dragon, Red dragon
Robbing a quad (Chankan)	1 han	Win with the tile another player uses to promote a quad.
Example tiles Example tiles: 1 of characters, 1 of characters, 1 of characters, 1 of characters
After a quad (Rinshan kaihou)	1 han	Win on the replacement tile after declaring a quad.
Example tiles Example tiles: 1 of characters, 1 of characters, 1 of characters, 1 of characters
Last tile draw (Haitei)	1 han	Win by self-draw on the last tile in the live wall.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters
Last tile claim (Houtei)	1 han	Win on the discard after the last tile in the wall.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters

Two han

Riichi patterns worth two han

Pattern	Pattern value	Condition
Double riichi	2 han	Declare riichi on the first discard before any call or concealed quad. It does not also count Riichi. Closed hand only.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters
Seven pairs (Chiitoitsu)	2 han	Seven different pairs. Closed hand only. The hand always uses 25 fu.
Example tiles Example tiles: 1 of characters, 1 of characters, 2 of characters, 2 of characters, 3 of circles, 3 of circles, 4 of circles, 4 of circles, 5 of bamboo, 5 of bamboo, 6 of bamboo, 6 of bamboo, 7 of bamboo, 7 of bamboo
Full straight (Ikkitsuukan)	2 han closed, 1 han open	Sequences 1-2-3, 4-5-6, and 7-8-9 in one suit.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters, 4 of characters, 5 of characters, 6 of characters, 7 of characters, 8 of characters, 9 of characters, 1 of characters, 2 of characters, 3 of characters, 5 of characters, 5 of characters
Mixed sequences (Sanshoku doujun)	2 han closed, 1 han open	The same sequence appears in all three suits.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters, 1 of circles, 2 of circles, 3 of circles, 1 of bamboo, 2 of bamboo, 3 of bamboo, 4 of characters, 5 of characters, 6 of characters, 5 of characters, 5 of characters
Mixed triplets (Sanshoku doukou)	2 han	The same triplet or quad appears in all three suits.
Example tiles Example tiles: 1 of characters, 1 of characters, 1 of characters, 1 of circles, 1 of circles, 1 of circles, 1 of bamboo, 1 of bamboo, 1 of bamboo, 2 of characters, 3 of characters, 4 of characters, 5 of circles, 5 of circles
All triplets (Toitoi)	2 han	Four triplets or quads and one pair.
Example tiles Example tiles: 1 of characters, 1 of characters, 1 of characters, 2 of circles, 2 of circles, 2 of circles, 3 of bamboo, 3 of bamboo, 3 of bamboo, 9 of characters, 9 of characters, 9 of characters, 5 of circles, 5 of circles
Three concealed triplets (Sanankou)	2 han	Three concealed triplets or quads.
Example tiles Example tiles: 1 of characters, 1 of characters, 1 of characters, 2 of circles, 2 of circles, 2 of circles, 3 of bamboo, 3 of bamboo, 3 of bamboo, 4 of characters, 5 of characters, 6 of characters, 7 of circles, 7 of circles
Three quads (Sankantsu)	2 han	Three quads.
Example tiles Example tiles: 1 of characters, 1 of characters, 1 of characters, 1 of characters, 2 of circles, 2 of circles, 2 of circles, 2 of circles, 3 of bamboo, 3 of bamboo, 3 of bamboo, 3 of bamboo, East, East
Common ends (Chanta)	2 han closed, 1 han open	Every group and the pair contains a terminal or honor. The hand needs a sequence and an honor.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters, 7 of characters, 8 of characters, 9 of characters, 1 of circles, 2 of circles, 3 of circles, 7 of circles, 8 of circles, 9 of circles, East, East
Common terminals (Honroutou)	2 han	The hand contains only terminals and honors. Add 2 han for All triplets or Seven pairs. This does not combine with Common ends.
Example tiles Example tiles: 1 of characters, 1 of characters, 1 of characters, 9 of characters, 9 of characters, 9 of characters, 1 of circles, 1 of circles, 1 of circles, 9 of circles, 9 of circles, 9 of circles, East, East
Little dragons (Shousangen)	2 han	Two dragon triplets or quads and a pair of the third dragon. The dragon groups add 2 han.
Example tiles Example tiles: White dragon, White dragon, White dragon, Green dragon, Green dragon, Green dragon, Red dragon, Red dragon, 1 of characters, 2 of characters, 3 of characters, 7 of circles, 8 of circles, 9 of circles

Three han

Riichi patterns worth three han

Pattern	Pattern value	Condition
Double twin sequences (Ryanpeikou)	3 han	Four sequences form two independent pairs of identical sequences. Closed hand only.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters, 1 of characters, 2 of characters, 3 of characters, 4 of characters, 5 of characters, 6 of characters, 4 of characters, 5 of characters, 6 of characters, 9 of characters, 9 of characters
Common flush (Honitsu)	3 han closed, 2 han open	Only one numbered suit and honor tiles.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters, 4 of characters, 5 of characters, 6 of characters, 7 of characters, 8 of characters, 9 of characters, East, East, East, White dragon, White dragon
Perfect ends (Junchan)	3 han closed, 2 han open	Every group and the pair contains a terminal, with no honors. The hand needs a sequence.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters, 7 of characters, 8 of characters, 9 of characters, 1 of circles, 2 of circles, 3 of circles, 7 of bamboo, 8 of bamboo, 9 of bamboo, 9 of characters, 9 of characters

Five han

Riichi patterns worth five han

Pattern	Pattern value	Condition
Blessing of man (Renhou)	Mangan (5 han)	Win by calling a tile before your first draw, with no call or concealed quad before the win. Closed hand only. It does not combine with other yaku or dora.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters

Six han

Riichi patterns worth six han

Pattern	Pattern value	Condition
Perfect flush (Chinitsu)	6 han closed, 5 han open	Only one numbered suit, with no honors.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters, 4 of characters, 5 of characters, 6 of characters, 7 of characters, 8 of characters, 9 of characters, 1 of characters, 2 of characters, 3 of characters, 5 of characters, 5 of characters

Yakuman

Riichi patterns worth one yakuman

Pattern	Pattern value	Condition
Blessing of heaven (Tenhou)	1 yakuman	East wins by self-draw from the initial deal, before a concealed quad. Closed hand only.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters
Blessing of earth (Chihou)	1 yakuman	A non-East player wins by self-draw on the first draw, before any call or concealed quad. Closed hand only.
Example tiles Example tiles: 1 of characters, 2 of characters, 3 of characters
Thirteen orphans (Kokushi musou)	1 yakuman	One of each terminal and honor, plus one duplicate. Closed hand only.
Example tiles Example tiles: 1 of characters, 9 of characters, 1 of circles, 9 of circles, 1 of bamboo, 9 of bamboo, East, South, West, North, White dragon, Green dragon, Red dragon, 1 of characters
Nine gates (Chuuren poutou)	1 yakuman	Concealed 1112345678999 in one suit plus one tile of that suit. A quad invalidates the pattern. Closed hand only.
Example tiles Example tiles: 1 of characters, 1 of characters, 1 of characters, 2 of characters, 3 of characters, 4 of characters, 5 of characters, 6 of characters, 7 of characters, 8 of characters, 9 of characters, 9 of characters, 9 of characters, 5 of characters
All green (Ryuuiisou)	1 yakuman	Only 2, 3, 4, 6, and 8 bamboo and the Green dragon. The Green dragon is not required.
Example tiles Example tiles: 2 of bamboo, 3 of bamboo, 4 of bamboo, 2 of bamboo, 3 of bamboo, 4 of bamboo, 6 of bamboo, 6 of bamboo, 6 of bamboo, 8 of bamboo, 8 of bamboo, 8 of bamboo, Green dragon, Green dragon
Four concealed triplets (Suankou)	1 yakuman	Four concealed triplets or quads. Win by self-draw or complete the pair with a discard. Closed hand only.
Example tiles Example tiles: 1 of characters, 1 of characters, 1 of characters, 2 of circles, 2 of circles, 2 of circles, 3 of bamboo, 3 of bamboo, 3 of bamboo, 4 of characters, 4 of characters, 4 of characters, 7 of circles, 7 of circles
Four quads (Suukantsu)	1 yakuman	Four quads.
Example tiles Example tiles: 1 of characters, 1 of characters, 1 of characters, 1 of characters, 2 of circles, 2 of circles, 2 of circles, 2 of circles, 3 of bamboo, 3 of bamboo, 3 of bamboo, 3 of bamboo, East, East, East, East, White dragon, White dragon
Perfect terminals (Chinroutou)	1 yakuman	Every tile is a terminal.
Example tiles Example tiles: 1 of characters, 1 of characters, 1 of characters, 9 of characters, 9 of characters, 9 of characters, 1 of circles, 1 of circles, 1 of circles, 9 of circles, 9 of circles, 9 of circles, 1 of bamboo, 1 of bamboo
All honors (Tsuu iisou)	1 yakuman	Every tile is an honor.
Example tiles Example tiles: East, East, East, South, South, South, West, West, West, North, North, North, White dragon, White dragon
Big dragons (Daisangen)	1 yakuman	Three dragon triplets or quads.
Example tiles Example tiles: White dragon, White dragon, White dragon, Green dragon, Green dragon, Green dragon, Red dragon, Red dragon, Red dragon
Little winds (Shousuushii)	1 yakuman	Three wind triplets or quads and a pair of the fourth wind.
Example tiles Example tiles: East, East, East, South, South, South, West, West, West, North, North, 1 of characters, 2 of characters, 3 of characters
Big winds (Daisuushii)	1 yakuman	Four wind triplets or quads.
Example tiles Example tiles: East, East, East, South, South, South, West, West, West, North, North, North, White dragon, White dragon

Each named yakuman uses an 8,000-point base value. Separate named yakuman combine. A counted 13-han hand uses the same limit base but is not a named yakuman.

Bonuses

Riichi bonuses that add han

Pattern	Pattern value	Condition
Dora	+1 han per matching tile	Each tile matching an active dora indicator adds one han. Dora alone is not a yaku.
Example tiles Example tiles: 5 of characters
Ura dora	+1 han per matching tile	Dora beneath active indicators. Count it only when the winner declared riichi.
Example tiles Example tiles: 5 of characters
Kan dora	+1 han per matching tile	Reveal one additional indicator after each successful quad.
Example tiles Example tiles: 5 of characters
Kan ura dora	+1 han per matching tile	Count the extra indicator beneath each kan dora only when the winner declared riichi.
Example tiles Example tiles: 5 of characters

Number tiles belong to three suits: characters, circles, and bamboo. Each suit has ranks 1 through 9.

Honor tiles are winds and dragons. A standard tile set contains four copies of each numbered and honor tile.

Riichi does not use flowers in this profile. The current tile model does not distinguish red fives.

A group is a sequence, triplet, or quad. A standard winning hand uses four groups and one pair.

Identify each fixed chi, pon, or kan as a declared group. A declared kan can be exposed or concealed.

• Sequence

  Three consecutive numbered tiles in one suit. Example: 2, 3, and 4 of characters.

  

  

  

• Triplet

  Three identical tiles. Example: three red dragons.

  

  

  

• Quad

  Four identical tiles. Example: four East tiles.

  

  

  

  

• Pair

  Two identical tiles. A standard hand uses one pair.

  

  

This Riichi profile supports Seven Pairs and Thirteen Orphans.

Declared group

A declared group is a fixed chi, pon, or kan. A declared kan can be exposed or concealed.

Ron

Ron is a win on another player's discard. The discarder pays the score charge in the applicable profile.

Tsumo

Tsumo is a win from your own draw. The other players provide the score charges.

Han

Han measures yaku and bonuses in a Riichi hand. Companion derives the total after it detects at least one yaku.

Example: two detected one-han awards produce a 2-han result.

Fu

Fu means minipoints from the hand shape, wait, groups, pair, and win source. Companion calculates and rounds this value.

Example: a 30-fu detected total stays at 30 fu.

Yaku

A yaku is a qualifying Riichi scoring pattern. A regular win needs at least one yaku.

Example: riichi is one yaku.

Dora

Dora is a bonus that adds han after the hand has a yaku. Dora alone cannot make a legal Riichi win.

Example: 1 dora adds 1 han after a yaku exists.

Yakuman

Yakuman is a named limit hand. Companion detects supported named yakuman.

Example: Kokushi musou, or thirteen orphans, uses one of each terminal and honor plus one duplicate.

One Kokushi musou pattern produces one yakuman.

Result type

Companion returns a regular han-and-fu result or a named-yakuman result.

Companion validates a scorable hand and derives supported WRC values. A manual aka count supplies the optional red-five extension.

Companion excludes continuance counters, riichi deposits, liability, dealer repeats, round progression, and the full hanchan lifecycle.

Source: World Riichi Championship Rules 2025 Version: 20250526.