Haku (伯) is a high-ranked official[1] in the Six Ministries of a kingdom. A haku-ranked official roughly holds the rank of a count or earl[2] and is sufficiently ranked to be able to cross the Kyokai if necessary.
Sennin who have ascended to their status through their own abilities are often the only individuals to be awarded the rank of haku[3]. A subset of the haku rank are keihaku ranked officials.