Tsuyoshi Ichinose is a Momotarou and Shiki's adoptive father, having taken him in when he was just a baby after finding him in a trash can.

Tsuyoshi is a middle-aged man with a wrinkled face. He has spiky, dark-colored hair with a beard and wears a yukata. Much like Shiki Ichinose, Tsuyoshi has a boisterous attitude and a vulgar way of speaking. He is deeply protective of his son and wants to see an end to the conflict between Oni and Momotarou.