Does Black Jack have siblings?
Black Jack has a half-sister, the daughter of his father and his father’s new wife, who appeared in one of the online animation episodes, and in issue #233, which also features Black Jack’s father and his father’s new wife. She is, as one would expect of the daughter of a wealthy international businessman, very concerned about the patrimony and hostile toward Black Jack as a potential competitor. In addition to this, Honma Joutaro has a daughter named Kumiko, whom Black Jack look out for as a kind of younger sister, though without ever revealing his reasons. In the original manga he saves her from an ailment in issue #87, “Full Moon Disease.” The authors of the recent TV series added her to the story told in episode 17, making her one of Wato’s classmates at the school, and having her persuade Black Jack to help a classmate in distress.
