Judo Boy

, otherwise known as Scarlet Sanshiro, is a Japanese anime television series created by Tatsuo Yoshida and Tatsunoko Productions. The series aired on Fuji TV from April 2 to September 24, 1969 for 26 episodes.

Two manga adaptations were created, the first published in Shogakukan's Weekly Shōnen Sunday from July 28 to November 17, 1968, and a 4-chapters series in Shueisha's Weekly Shōnen Jump from May 22 to July 10, 1969.

Plot
A teenage martial artist named Sanshiro trains in the Kurenai School of Jiujitsu while also centers searching for his father's murderer. Accompanying Sanshiro is an orphaned boy named Kenbo and his pet dog Boke. Sanshiro's only clue to his father's murderer is a glass eye left on the scene of the crime, suggesting that his father's murderer was one-eyed. Thus many of the villains Sanshiro fought during the course of the series were one-eyed or with an eyepatch.