The main character and narrator for much of the first volumes (that make up the less serious portion of the series). He is a 2nd year student at Kangokou High School and a walking target for beatings at the hands of the school's numerous youth gangs. He is rarely seen without his close friend Saitou at his side. His growing frustration at being the gang members' punching bag leads him to join Kangokou's &quot;Karate Club&quot;, a fighting school for Osaka's toughest delinquents, gang members, and other unsavory teenagers that covers as a typical school sports club. At first he is picked on and harassed even worse by the club's members, but gradually learns a great deal about fighting and standing up for himself from his time with the club. In spite of his newfound confidence and abilities, he still has absolutely no luck with girls, as they tend get frightened off or quickly lose interest when he mentions which school club he belongs to. As the series goes on it shifts the focus off Matsushida and he becomes more of a supporting character.

Osu!! Karate Bu takes place at Kansai Fifth Technical High School, a school known for its delinquents, even for Osaka. Its karate club is known widely as the toughest thugs of all. First-year Matsushita Tadashi joins the karate club to stop people from picking on him, but ends up with more than he bargained for. The series soon focuses on the captain, Takagi Yoshiyuki, the strongest gangster in Osaka, and his struggle to protect the karate club and protect the city of Osaka.

(Source: AniDB)

Husband of voice actress [Junko Sakuma](https://anilist.co/staff/111433).

Matsushita Tadashi is a second year student at Kangokou High School (in Osaka, Japan) and a constant target of Kangokou's numerous bullies who beat him up routinely after school. He is accompanied by his best friend Saitou Takaki, who is also constantly harassed. <br><br>
As the pair grow increasingly tired of being victimized they decide to join the titular Karate Club, which is notorious throughout Osaka's youth gangs for training and producing the city's most hardened and toughest teenage thugs while maintaining the facade of a legit school sports club. But when they join the club, they find themselves picked on just as much if not worse by the club's current members.