Aa Harimanada (ああ播磨灘; Ā Harimanada) is a Japanese media franchise that began with a 1991 manga by Kei Sadayasu published in Kodansha's Weekly Morning. An anime television series was broadcast in 1992. The series was later adapted to a video game developed and published by Sega for the Sega Game Gear and Sega Mega Drive. A port was also released on the Game Boy, released by ASK.
When Harimanada makes his grand entrance into the world of Sumo, he causes complete uproar throughout the entire arena. The novelty headmask is clearly not a good idea but not content with just ruffling the feathers of all the spectators, he sends the entire Sumo Association into a frenzy when he arrogantly declares that he will surpass the legendary Futabayama's consecutive run of 69 victories. Should he fail to achieve such a feat, he will immediately retire all together.
Harimanada's impudent remarks cause a huge backlash as every high-ranking Yokuzuna wants the chance to knock him down and humiliate him for showing such arrogance.
Thus begins Harimanada's journey to the top as he battles to topple the entire Sumo hierarchy!