This man was the father of Kayoko Kotohiki. He had an affair with Kayoko's mother which resulted in the birth of Kayoko. Due to his status as a banker, he couldn't be involved in Kayoko's life that much but he did what he could. He set up Kayoko's mother to run a bar so that they would have money to get by. He does drop in once and awhile to check up on the two.