Hideaki Kobayakawa (小早川秀秋 Kobayakawa Hideaki, lit: Arrival Of A Small Stream Before Autumn) is a member of the Central 46 and one of its judges, known for his political skill and knowledge in warfare, he is one of the 46's most prized members. Hideaki was formerly a member of the Eleventh Division, and was a comrade of Kenpachi Kiganjō before his promotion to Captain while Hideaki was appointed as a judge. He is known to have created the unique Kanseiryū style of combat, as well as being exceedingly skilled with a blade. He is the father of Masatsugu Kobayakawa.