Hōki-ryū (伯耆流) is a Japanese koryū sword-fighting martial art founded in the late Muromachi period by Katayama Hōki-no-kami Fujiwara Hisayasu (片山伯耆守藤原久安) (1575–1650).
[1] Additionally, Katayama Hisayasu was also said to have been the younger brother of Takenouchi Hisamori (竹内久盛), founder of Takenouchi-ryū (竹内流).
In a divine dream, Hisayasu was supposedly given insight and was said to have attained enlightenment to the mysteries of the art of iai.
Using Iso-no-nami as a base, Hisayasu and later generations of the Katayama and Hoshino families developed and established over seventy sword forms,[3] although many of these have been lost in most groups practicing Hōki-ryū today.
Ono-ha Hōki-ryū was founded by Ono Kumao (himself of Hoshino lineage) and is today primarily practiced under the auspices of the All Japan Iaido Federation.