Kōji (こうじ Kōji) is a student of Nekketsu High School. His first appearance is in the Famicom version Nekketsu Kōkō Dodgeball Bu. He also appears in Shodai Nekketsu Kōha Kunio-kun, where he can save the player's game.
- In Super Dodge Ball he is renamed Mike Knopfler and is he is now a member of Team USA.
- In River City: Tokyo Rumble, he is named Curly.