The 12-year-old son of Heitarou. First appears being tutored by Osuzu, then turns up in fight trying to get the deed to Osuzu's father's store back. Jin saves him from a beating and becomes his bodyguard.
~!Takes matters into his own hand after his father refuses to get Osuzu out of the brothel, and he and Jin infiltrate dressed as an old man and a woman, respectively. They fail to free Osuzu, and the next day Susuke kills a Nagatomi who tries to molest her, precipitating a showdown between the clans. Susuke becomes the Nagatomis' hostage-wager, and is freed after Heitarou commits seppuku to atone for the murder, leaving his son as the head of the Kawara clan. !~
(Source: Neko-san's Guide to the Characters of Samurai Champloo)