Miyamoto Musashi (宮本 武蔵?, c. 1584 – June 13, 1645), also known as Shinmen Takezō, Miyamoto Bennosuke or, by his Buddhist name, Niten Dōraku, was a Japanese swordsman and rōnin. Musashi, as he was often simply known, became renowned through stories of his excellent swordsmanship in numerous duels, even from a very young age. He was the founder of the Hyōhō Niten Ichi-ryū or Niten-ryū style of swordsmanship and the author of The Book of Five Rings (五輪の書, Go Rin No Sho?), a book on strategy, tactics, and philosophy that is still studied today. The details of Miyamoto Musashi's early life are difficult to verify. Musashi himself simply states in Gorin no Sho that he was born in Harima Province. Niten Ki (an early biography of Musashi) supports the theory that Musashi was born in 1584: " was born in Banshū, in Tenshō 12 , the Year of the Monkey." The historian Kamiko Tadashi, commenting on Musashi's text, notes: "Munisai was Musashi's father...he lived in Miyamoto...