It is said that the school's ancestral beginning was when Hogen KIICHI taught the way of the sword to eight Buddhist monks on Mt. Kurama in the end of the Heian period, and it is said to be the origins of all swordsmanship.
平安時代末期に鬼一法眼が京都の鞍馬山で8人の僧侶に刀法を伝えたところを始祖として、現代まで伝わる全ての剣術の源流となったとされる。