Gyokko Ryu Koshijutsu Book by Valery Momot Shoji Arimitsu Royler reveals the submissions that

Royler reveals the submissions that allowed him to win many fights throughout his illustrious career

While this may be acceptable for those who are actively involved in tournaments

Rule 4: Effective Communication

Body Adjustments (Front and Rear)

and martial applications

Gyokko Ryu Koshijutsu Book by Valery Momot Shoji Arimitsu Royler reveals the submissions thatThe book is devoted to most ancient confirmed style of bujutsu and ninjutsu of district Iga, which has more than thousand year old history, and which formed a basis for many styles of martial arts generally, and several styles of ninja taijutsu in particular (Iga ryu, Hakuun ryu, Togakure ryu, Koto ryu, Gikan ryu, Gokushin ryu etc.) Nowadays Gyokko ryu koshijutsu is the base of training of Bujinkan dojo. In the new book the first time are examined all