|Japanese Name||朝永 章|
|Wins by KO||14|
|Manga Debut||Mentioned only|
|Anime Debut||Mentioned only|
As a stock character of the series Tomonaga is a character that is mentioned, but never seen. He fought against Date Eiji in the latter's pro debut match and lost in the first round by KO.
Tomonaga's fighting style is never brought up by any character in the series. As such, one can only assume that he is able to fight with basic boxing techniques due to having passed his pro test before the match against Date.