二天一流
The Ogasawara and Hosokawa clans were "daimyō" at Kokura Castle during the Edo period (1603–1868). Miyamoto Musashi, samurai swordsman, author of "The Book of Five Rings" and founder of the Hyoho Niten Ichi-ryū, famous for its use of two swords, lived in the Kokura castle under the patronage of the Ogasawara and Hosokawa clans briefly during 1634.