Ishizuka Tetsuji, soke of Gyokko Ryu, has decided to write a book about the school that is called “the backbone of classical Japanese martial arts“. Stay tuned for the financing campaign for the publication this january! Aside from being Soke of Gyokko Ryu, Bujinkan Dai Shihan Ishizuka sensei also has menkyo kaiden of the following schools: Kukishin Ryu Dakentaijutsu Togakure Ryu Ninpo Koto Ryu Koppojutsu Shinden Fudo Ryu Dakentaijutsu Takagi Yoshin Ryu Jutaijutsu Gyokushin Ryu Ninpo Gikan Ryu Koppojutsu Kumogakure Ryu Ninpo
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