Sakigake!! Otokojuku (Japanese: 魁!!男塾, lit. "Charge!! Men's Private School"), also known as simply Otokojuku, is a Japanese manga series written and illustrated by Akira Miyashita. It was originally serialized in Shueisha's Weekly Shōnen Jump from 1985 to 1991. It is staged in an all-boys school that teaches how to be true men. The students are trained to "revive the Spirit of Japan" and mainly engage in events where they will polish their manhood and push through with their guts.