Mashiba Kumi - Character (111) - AniDB

Fighting Spirit: Rising (TV Series 2013–2014) - IMDb

Ippo Makunouchi by Ozee

AJ on X: Some characters that are not in the list that I'd personally include are listed below in the picture. Also, some characters are different than they might otherwise be because

Little Mac (Punch Out!!) vs. Ippo Makunoichi (Hajime no Ippo)

Little Mac VS Makunouchi Ippo (Punch-Out! VS Hajime no Ippo) - An Underdog's Determination. : r/DeathBattleMatchups

Little Mac vs Ippo Makunouchi Prelude by Strunton on DeviantArt

Kamogawa Did Not Seem to Age that Well : r/hajimenoippo

Berserk Mangaka Kentaro Miura Passes Away At Age 54 - Bounding Into Comics

Kouichi Yamadera to Succeed Ichiro Nagai in Hajime no Ippo - News - Anime News Network

Hajime no Ippo (Fighting Spirit)