# Daisuushii — Riichi Mahjong Glossary

> Big four winds - a double yakuman (in some rule sets) where you have triplets of all four winds.

**Source:** https://www.mahjongmaster.co/learn/riichi/glossary/daisuushii/
**Author:** Kenji Tanaka (https://www.mahjongmaster.co/about/kenji-tanaka/)
**Publisher:** Mahjong Master (https://www.mahjongmaster.co)
**Published:** 2026-02-18
**Updated:** 2026-03-10
**Japanese:** 大四喜
**Category:** hand-structure
**Variant:** riichi

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## Daisuushii

**Daisuushii** (大四喜, だいすーしー) is one of the rarest yakuman hands, requiring triplets of all four wind tiles: East, South, West, and North. In most rule sets, it's valued as a **double yakuman**, worth twice the standard yakuman payment (64,000 points for a non-dealer, 96,000 for the dealer). The name translates to "big four winds."

## How Daisuushii works

### Requirements

To achieve daisuushii, you must have:
- **Triplet of East**: Three East wind tiles
- **Triplet of South**: Three South wind tiles
- **Triplet of West**: Three West wind tiles
- **Triplet of North**: Three North wind tiles
- **Any pair**: The pair can be any tile

All four melds must be wind triplets. The triplets can be open (pon) or concealed (ankou), double yakuman value remains regardless.

### Double Yakuman Status

**Most modern/online rules**: Daisuushii is a double yakuman worth 16,000 base points (64,000 total for non-dealer, 96,000 for dealer).

**Some traditional rules**: Daisuushii is a single yakuman worth 8,000 base points (32,000 total for non-dealer, 48,000 for dealer).

The double yakuman status reflects the extreme difficulty, requiring 12 specific wind tiles (three each of four different winds) from a set containing only 16 total wind tiles.

### Extreme Rarity

Daisuushii is legendarily rare:
- **Tile requirements**: Twelve of the 16 available wind tiles must come to you
- **Opponent interference**: After exposing two or three wind triplets, opponents completely stop discarding winds
- **Statistical improbability**: Even playing thousands of hands, most players never achieve daisuushii

Achieving daisuushii is considered a major mahjong milestone and often photographed or recorded when it occurs.

### Comparison to Shousuushii

**Shousuushii** (little four winds): Three wind triplets + one wind pair → Single yakuman

**Daisuushii** (big four winds): Four wind triplets → Double yakuman

The difference is significant, shousuushii needs only a pair of the fourth wind (easier) while daisuushii requires a full triplet (much harder). This extra difficulty doubles the point value.

### Strategic Considerations

**Near-Impossible Without Calls**: Self-drawing 12 wind tiles is virtually impossible. You must call pon aggressively on any wind discards.

**Telegraph Immediately**: Once you have two or three wind triplets exposed, your daisuushii intention is obvious. Opponents will hoard all remaining winds.

**Yakuhai Foundation**: Even incomplete daisuushii hands provide strong yakuhai value from multiple wind triplets matching seat/round winds.

## Seeing Daisuushii in play

In an extremely lucky hand, you call pon on East, South, and West winds as they appear early in the game. You self-draw three North tiles, completing the fourth wind triplet. Your hand: East-East-East, South-South-South, West-West-West, North-North-North (four wind triplets), plus any pair. When you win, you declare **daisuushii** (double yakuman). Under double yakuman rules, you score 16,000 base points (64,000 total for non-dealer, 96,000 for dealer), the maximum possible non-dealer payment and devastating for opponents.

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*This content is from [Mahjong Master](https://www.mahjongmaster.co), a free educational reference for riichi (Japanese) and American (NMJL) mahjong. When citing this page, please link to https://www.mahjongmaster.co/learn/riichi/glossary/daisuushii/.*