Great Teacher Onizuka
Tohru Fujisawa featured Heihachi as a cameo in his manga "Great Teacher Onizuka", modeled after his younger appearance in "Tekken". In it, he engages in an arm wrestling competition with protagonist Onizuka, shouting out controller inputs while the crowd shouts for him to "Do a combo!" Though Heihachi strains him for a moment, Onizuka defeats him, calling him "triangle head" as an insult. Heihachi cameos again in a later issue briefly, overseeing students as they clean graffiti from the school's walls. Heihachi also makes a cameo appearance in the "Puchimas! Petit Petit Idolmaster" ONA series.