Musashi by Iji Yoki Shawa

Miyamoto Musashi is probably the most famous swordsman from Japan. He fought his first duel at age 13 against a grown man who he killed by throwing him to the ground and then beating him with a bock in which is basically a wooden sword. His most famous duel was against a guy named Kojiro, also known as Ganyru. And they were both at the time when they fought like the most famous and feared swordsman in Japan.