Daitō-ryū Aiki-jūjutsu
The temple monk (Wantanabe Kintaro) was reputedly a friend of Takeda Sōkaku, the founder of the Daitō-ryū Aiki-jūjutsu system, which is a Japanese martial arts system emphasizing empty handed methods based upon the sword styles and jujutsu tactics in which Takeda was an expert. Later Takeda Sōkaku would also famously teach Morihei Ueshiba, the founder of aikido.