Yakuhai
Last updated: 2026-08-18Yakuhai are han from honor triplets or quads: dragons, round wind, and seat wind. Each triplet is 1 han; when round and seat wind match (double wind), that wind triplet counts 2 han. See Riichi Mahjong Yaku Guide and Counting Han.
Requirements
Yakuhai must be a triplet or quad (pairs or honors inside sequences do not count).
Dragons
White (z5), green (z6), and red (z7) triplets or quads — each 1 han. Stackable (e.g. three dragon triplets = 3 han).
Round wind
Triplet of the wind matching the current round. East round → east triplet is round wind yakuhai.
Seat wind
Triplet of the wind matching your seat. East seat → east triplet; south seat → south triplet, etc.
Double wind
When round and seat wind match (e.g. east seat in east round with an east triplet), that triplet counts as round + seat wind — 2 han.
Guest winds (neither round nor seat wind) are not yakuhai. Example: west triplet for south seat in east round — no yakuhai unless another yaku applies.
Valid examples
White dragon
White triplet + tanyao shape — yakuhai (white) 1 han (full hand may include other yaku; core point is the white triplet).
Green dragon
Green triplet — yakuhai (green) 1 han.
Red dragon
Red triplet — yakuhai (red) 1 han.
Double wind (east round, east seat)
East triplet is both round and seat wind — 2 han (east round, east seat: zhuangfeng: 0, menfeng: 0).
Invalid or confusing
Guest wind west (east round, south seat)
West triplet is a guest wind — not yakuhai. Hand has Toitoi and Sanankou, but no yakuhai yaku.
Stacking and open hands
Yakuhai works when open. Often stacks with tanyao, toitoi, shousangen, etc. Multiple yakuhai triplets add han.
Scoring
Yakuhai triplets add 8 fu (open vs closed per rules). With Toitoi and other triplet-heavy shapes, fu rises sharply. See Fu Calculation Basics.