Musashi (宮本武蔵 Miyamoto Musashi?) is a Japanese novel written by Eiji Yoshikawa. It was serialized in 1935 in the newspaper Asahi Shimbun.
It is a fictionalized account of the life of Miyamoto Musashi, author of The Book of Five Rings and arguably the most renowned Japanese swordsman who ever lived.
The long epic comprises seven "books" detailing the exploits of Miyamoto Musashi, beginning just after the battle of Sekigahara, following his journeys and the many people who become important in his life, and leading up to his climactic duel with Sasaki Kojiro on Ganryujima (Ganryu or Funa Island). Musashi becomes famous during the course of the novel as he searches for both perfection in swordsmanship and in consciousness. Innovating Japanese swordsmanship, he invents the style of simultaneously wielding both the katana and the wakizashi, something unheard of at that time in Japanese history.