Atsushi's Father

About

He is Atsushi's father. He owns a liquor store which he'd like to leave to his son, and Atsushi refusal to take it over leads to the argument that makes Atsushi leave home and stay with Amano temporarily.

To Amano's surprise, he is the "shisho" (master) that he's been looking for for years, to thank for setting him on the right path.