Gyokko-ryū () is a school of Japanese martial arts that specialises in kosshijutsu (), shitōjutsu () and ninjutsu (). Gyokko-ryū was founded by Tozawa Hakuunsai Hogen (, 1156–1159) in the Heian period (794–1192).Watatani Kiyoshi, Yamada Tadashi (1978). Bugei Ryuha Daijiten (武芸流派大事典) (Large Encyclopedia of Martial Arts) (in Japanese). Shin Jinbutsu Ourai Sha (人物往来社). pp. 229–230. The sōke title is claimed to be passed down to Tetsuji Ishizuka from Masaaki Hatsumi (1931–) who in turn received it from Toshitsugu Takamatsu (1889–1972). Tetsuji Ishizuka has died on March 15, 2025, no successor has been appointed yet.
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