Muso Shinden Ryu is a school of Iido. In the Taisho era (beginning of 20th century) , Nakayama Hiroku who learned Musokin Shinbuden Hideyoshi Ryu and Musou Wataru Hidenobu ryu, founded this school by adding his unique ideas. It became the mother of modern Iaido with Musou Jikiden Eishin Ryu.