Ikkyū-san (Shinji Mizushima)

, also known as Highschool Baseball Ninja, is a Japanese baseball manga series written and illustrated by Shinji Mizushima. It was serialized in Shogakukan's Weekly Shōnen Sunday from 1975 to 1977, with the chapters published in 14 tankkobon volumes.

A TV anime series adaptation was produced by Nippon Animation and aired on Fuji TV from April 10 to October 23, 1978.

Plot
Ikkyū Sanada knows nothing about baseball, but his talents are recognized by the manager of his high school baseball club, and he takes up this enchanting sport. While his ignorance of the game leads him to make many mistakes, Ikkyū—who is in fact a ninja descendant—displays his superhuman abilities and leads the team to the High School Baseball Championships.