Hiroshi (ひろし) is a fictional character in the Nekketsu Kouha Kunio-kun.
- Hair Color: Brown
- Eye Color: Brown
- Blood Type: O
- Status: Alive
- Affiliation: Nekketsu High School
- Year: Sophomore (Nekketsu Kouha Kunio-kun series), Senior (Downtown Nekketsu series)
- Alternate Names: John Stone (Super Dodge Ball, NES)
- Hobbies: Watching gangster movies
He is Kunio's best friend in the original Nekketsu Kouha Kunio-kun game. In the games he appears in, Kunio usually goes out of his way to ensure his safety whenever he's in danger.
Hiroshi admires Kunio because of his benevolence and strength. He rarely gets involved in fights, but tries to help Kunio and his other friends whenever he can by being an informant in his adventures.
He yearns to be a righteous, tough guy delinquent someday (just like Kunio).
In the arcade version of the game, he is beaten by different gangs, each led by Riki, Shinji, Misuzu and Sabu before the start of each stage, prompting Kunio to avenge him. After defeating Sabu at the end of the game, Kunio comes out of the building only to see Hiroshi and the other students of Nekketsu High School cheering for him on his victory. Kunio and Hiroshi then shake hands. In the Famicom version, he is kidnapped by Sabu, and Kunio must rescue him.
- Artwork from the Famicom version of Nekketsu Kouha Kunio-kun has Hiroshi's gakuran colored purple. This is probably the origin of the purple uniforms used by the Nekketsu High School students in the Downtown Nekketsu series and some of the sports games. For the sake of consistency, the franchise now uses white gakurans for all Nekketsu High School students.
- According to his bio in River City Super Sports Challenge ~All Stars Special~, Hiroshi's hobby is watching gangster movies.