Hokushin Ittō-ryū
A swordsman of the Hokushin Ittō-ryū, Naitō taught kendo to the Japanese Police force, and was also the first teacher at the Budo Senmon Gakko. He helped to create the Dai Nihon Teikoku Kendo Kata, a group that promulgated the practice of kendo in Japanese schools and universities under the auspices of the Dai Nippon Butoku Kai.