Haku can refer to several distinct entities in the Twelve Kingdoms.
- Haku, written as 駮 in Japanese, is a type of youjyuu that resembles a horse.
- Haku, written as 伯 in Japanese, is a rank held by court officials of the Six Ministries of a kingdom.
- Haku District, written as 白郡 in Japanese, is a location in the kingdom of En
- Haku, written as 白 (white) in Japanese, is the surname given to all nyokai, the principal guardians of kirin. For example, the nyokai of Taiki is known by the full name of Haku Sanshi.