Hoshizaki Ainosuke, karate champion, learns about the mysterious Kawabata Tsuyoshi, a skinny convenience store worker who is impossibly strong. Martial artists and challengers keep coming after Tsuyoshi but no one can defeat him. Written and illustrated by Kyōsuke Maruyama. Japanese manga. Ongoing.

Read TSUYOSHI manga in English, updated regularly. Also known as: TSUYOSHI 誰も勝てない、アイツには · Tsuyoshi: Daremo Katenai, Aitsu ni wa