Takemoto's stepfather. He is an affable and loud man, but Takemoto has difficulty getting used to him because of how different Kazuo is from his father. Kazuo often means well, but is not terribly articulate and usually tries to use his actions to express what he means. He and his family accept both Takemoto and his mother as part of their family, though Takemoto still feels as though he does not belong. Because Takemoto and his mother have an unconscious tendency to avoid relying on others, Kazuo is somewhat frustrated that they don't seem to trust that he will help them. He tells them after Takemoto falls ill and is hospitalized before he is able to graduate; Takemoto openly asks if Kazuo would be able to help him with expenditures since Takemoto will need to attend school for another year, which Kazuo happily agrees to.