Fuyuhiko Usami (宇佐見 冬彦, Usami Fuyuhiko) is Haruhiko and Akihiko Usami's father. Misaki Takahashi had met him in the subway and helped him to ride a train. Fuyuhiko Usami was fetched by his eldest son, Haruhiko, at the exit where Misaki had found out that Fuyuhiko was Haruhiko and Akihiko's father. In the manga, he is often called Usagi-chichi by Misaki. It would seem that he took the surname of his wife (Akihiko's mother) due to the fact that Kaoruko Usami is Akihiko's cousin on his mother's side.