|Relatives, etc.||Unnamed Son|
|Anime debut||Episode 8|
|Manga debut||Chapter 18|
Hashimoto is only mentioned by name.
Nothing is known about his appearance other than he's a grown man.
Nothing is known about his personality, other than he may have been a good person, due to how shocked the women were, at his son's actions.
Hashimoto is first mentioned, while Shinichi is using his acute hearing, and listens to the area around him. There are two ladies gossiping about his son, seeminly shocked.