関口流柔術

[@Tentaisei]

what is this Ryu-ha, my japanese isnt good enough to read the Kanji

[@motokiN.K]

This is called the Sekiguchi Ryu
There was a man in the Shinsengumi who used this technique.

[@azamisark7082]

新撰組四番隊組長の松原忠司ですね！よくご存知で！