Honitsu

Honitsu (混一色)

Honitsu (混一色, literally “mixed one color”) is a half flush yaku worth 3 han when the hand is closed, or 2 han when open. It is one of the most common intermediate-level yaku in mahjong and forms the foundation for understanding hand composition and suit strategy.

Detailed Explanation

Honitsu requires that your completed hand contain tiles from only one suit plus honor tiles (winds and dragons). Unlike the more restrictive chinitsu (pure flush), which uses only one suit, honitsu allows the inclusion of any honor tiles alongside your primary suit.

Hand Composition Requirements

A honitsu hand must satisfy these conditions:

• All simples (numbered tiles) come from a single suit only (bamboo, characters, or dots)
• Honor tiles (East, South, West, North, White, Green, Red) may appear in any quantity
• No tiles from the other two suits may be present
• The hand must form a valid winning pattern (four melds plus a pair, or equivalent)

Han Value

The han value depends on whether your hand is closed or open:

• Closed hand (menzen): 3 han
• Open hand (with melded sets): 2 han

This one-han reduction for open hands reflects the principle that concealment adds value in mahjong scoring.

Strategic Importance

Honitsu occupies a middle ground in hand difficulty and frequency. It is significantly easier to achieve than chinitsu because honor tiles provide flexibility, yet it still requires focused tile collection. Many hands naturally progress toward honitsu during play, making it a practical yaku for intermediate players to pursue.

Honor tiles are particularly valuable in honitsu because they can simultaneously:

• Contribute to the honitsu requirement
• Form their own melds (pung or kong)
• Serve as scoring yakus themselves (such as dragon pung or seat wind)

This efficiency makes honitsu hands often worth more than their base han value suggests when combined with other yakus.

Usage Example

Example Hand:

Bamboo: 2-3-4, 5-5-5, 7-8-9, 9-9
Dragons: White-White-White
Pair: East-East

This hand contains only bamboo simples plus honor tiles (dragons and a wind). When this hand wins, it qualifies as honitsu and scores 3 han (if closed).

Scoring Combination:

If the same hand also includes a pung of dragons (White), it would score:

• Honitsu: 3 han
• Dragon Pung: 1 han
• Total: 4 han

This demonstrates how honitsu commonly combines with other yakus to create competitive scoring hands.

Related Terms

Chinitsu (清一色) - A pure flush using only one suit with no honor tiles. Worth 6 han closed or 5 han open, chinitsu is the premium version of honitsu and significantly more difficult to achieve.

Yaku (役) - The hand patterns or combinations that determine scoring value in mahjong. Honitsu is one of approximately fourteen standard yakus.

Honor Tiles (字牌, jipai) - The seven non-suited tiles comprising four winds and three dragons. These tiles are essential to honitsu composition.

Han (番) - The point-multiplier unit in mahjong scoring. Hands accumulate han from various yakus, with higher han values producing exponentially higher scores.

Meld - A set of tiles forming part of a completed hand, either concealed (pung, kong) or open (melded pung, melded kong, chow). Open melds reduce honitsu’s han value from 3 to 2.

Suit (色, shoku) - One of three categories of numbered tiles: bamboo, characters, or dots. Honitsu restricts all simples to a single suit.

Honitsu represents a natural progression in mahjong skill development, offering players a balance between achievability and scoring potential while introducing the strategic discipline of suit focus.