Meishi-ha Mugai Ryu Iaihyodo is a koryu (feudal era) school of swordsmanship founded in 1693. Emphasis in Mugai Ryu is placed on practical, close-quarters techniques of drawing and cutting against single or multiple opponents. Training in Mugai Ryu begins with practice of the 20 fundamental seated and standing kata (forms). Later practice includes more advanced kata and partner practice with both long and short swords. Mugai Ryu students also practice tameshigiri: the cutting of targets using live blades.
Shinjinkai's program is affiliated with the Suimokai, an organization in Japan dedicated to the preservation of several martial arts including Mugai Ryu. It is led by Niina Toyoaki Gyokudo, the soke (headmaster) of Meishi-ha Mugairyu Iaihyodo.