Miyamoto Musashi , also known as Shinmen Takezō, Miyamoto Bennosuke, or by his Buddhist name Niten Dōraku, was a Japanese swordsman famed for his duels and distinctive style. Musashi, as he is often simply known, became legendary through his outstanding swordsmanship in numerous duels, even from a very young age. He is the founder of the Hyōhō Niten Ichi-ryū or Niten-ryū style of swordsmanship and the author of The Book of Five Rings , a book on strategy, tactics, and philosophy that is still studied today.