Rowdy Sumo Wrestler Matsutaro

It is a divine ritual, a martial art, a combat sport—it's sumo!! A "small" new student, Ushio Hinomaru, appears before the weak little sumo club of Oodachi High School! The words "big" and "heavy" are the rules to this sport, which does not fit this newbie any inch, but this guy goes and does what...!? Ushio and the small sumo club climbs its way to the top! The goal is Hinoshita Kaisan (A title for the highest rank in professional sumo, equivalent of Yokozuna)! A fired up high school sumo tale—no retakes allowed!!

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 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!

After former motorcycle gang leader Yajima Kintaro saves the life of the Yamato Construction Company's CEO, he is offered a job working for the company. However, when it becomes apparent that a corrupt faction of the company is trying to gain full control, Kintaro's moral and physical strengths become more useful than the CEO ever imagined. As he works his way up the career ladder Kintaro is forced to deal with many problems, from confrontations with Yakuza bosses to preventing the collapse of a tunnel. But can an uneducated and rowdy person really make it as a salaryman?

Musashi Mountain High School third grade Goshogawara is the only member of his school's sumo club. In order to take part in competitions, he tries to attract more members, and thanks to his enthusiasm and sincerity four more people join the club: judo team captain Kaoru Kiyokawa; pro wrestler Takayuki Kannai; skinny thug wannabe Nanno Ippei; and Raiden Goro, a giant guy but a very shy person who also happens to be an expert Go player. The five train together and later take part in a competition against a professional sumo club.