Sanshiro's hunt for his father's killer doesn't just fuel the plot, it reveals who he actually is with every opponent he faces. This is 1969 martial arts cinema that understands revenge isn't about closure; it's about the person you become while searching for it. The action speaks like classic kung-fu films do, without wasting words, and Sanshiro gets complicated in ways most anime of that era didn't bother attempting.

Sanshiro Kurenai is the proud heir to a judo dojo, and his life changes the day he finds his beloved father dead. Lying near the body is a glass eye, the one hint to who did it. Determined to avenge his father and win back his honor, Sanshiro sets out with his friend Ken to track down the mysterious one-eyed killer in this action and sports series from 1969.