Hideaki, also known as Hideaki of Chōshū, is an ally of the Kurohabaki Clan and the boss of a wild dog group in Chōshū.
Ginga Densetsu Weed: Orion
Although Hideaki worked in his own small group away from Masamune, he would often meet up with him to exchange information. After he and his small group fell into a canyon full of toxic gases, Gennai saves him. Hideaki goes back to Masamune who decapitates him in front of everyone for failing his mission and kills him by cutting off the his neck using Ningatō.