Haku

Haku

Haku (白, literally “white”) is the white dragon tile, one of the three dragon tiles in mahjong and a member of the honor tile family.

How Haku works

Haku is one of three dragon tiles collectively known as sangenpai (三元牌), which translates to “three origin tiles” or “three terminal tiles.” The three dragons are distinguished by their names and traditional representations:

• Haku (白) - The white dragon, typically depicted as a blank tile or a tile with a blue border
• Hatsu (發) - The green dragon, marked with the Chinese character 發
• Chun (中) - The red dragon, marked with the Chinese character 中

As an honor tile (jihai), haku cannot be used in sequences or chows. It can only be used in triplets (刻子, koutsu) or quads (槓, kan). This restriction is fundamental to mahjong tile mechanics and distinguishes honor tiles from number tiles (suupai).

Yakuhai Value

Haku forms a yakuhai (役牌, “tile that creates a yaku”) when a player completes a triplet or quad of haku tiles. This yakuhai is worth one han and is one of the easiest yaku to achieve in mahjong, as it requires only collecting three identical tiles. Many beginning players naturally form haku yakuhai while collecting other tiles, making it a common component of winning hands.

The yakuhai yaku applies equally to all three dragons, haku, hatsu, and chun, as well as to wind tiles (kazehai) that match the player’s seat wind or the prevailing wind.

Appearance and Recognition

In traditional mahjong sets, haku tiles are typically blank or feature minimal markings. Some sets display a blue border or frame around the tile to distinguish it from other tiles. This simple design contrasts with hatsu and chun, which feature prominent Chinese characters. The blank appearance of haku makes it instantly recognizable and easy to identify during play, even from a distance.

Strategic Considerations

While haku yakuhai is valuable, it is relatively low-value as yaku go, contributing only one fan to a hand’s scoring. Experienced players often consider haku in the context of larger hand strategies rather than as a primary objective. However, haku can serve as a useful building block when combined with other yaku or when pursuing specific hand patterns.

Haku tiles are also valuable in certain advanced yaku such as:

• Daisangen (大三元) - A hand containing triplets of all three dragons, a yakuman
• Shousangen (小三元) - A hand containing triplets of two dragons and a pair of the third dragon, worth 2 han plus the two dragon yakuhai (4 han total)
• Tsuuiisou (字一色) - A hand composed entirely of honor tiles, including dragons, a yakuman

Walking through Haku

A player holding two haku tiles actively pursues a third haku tile to complete a triplet. Once the triplet is formed, the player declares it and automatically gains one fan toward their hand’s final score. If the player’s hand also contains a triplet of hatsu or chun, they move closer to completing shousanggen or daisanggen, significantly increasing their hand’s value.