Muso Jikiden Eishin Ryu is a martial school originally specializing in quick-draw swordsmanship (iaijutsu), long hardwood staff techniques (bojutsu), and arresting arts (torinawa). This school is essentially the Shin Muso Hayashizaki Ryu as reformulated by its seventh headmaster, Hasegawa Chikaranosuke Eishin, around 1736. The transmission line split into two branches after the death of the eleventh headmaster Oguro Motoemon Kiyokatsu; one branch became the Shinomura Ha and the other the Tanimura Ha. The current curriculum, which consists primarily of quick-draw swordsmanship (iaido), was reformulated by Goto Magobei Masasuke (d. 1898) and Oe Masamichi Shikei (1852-1927), the respective sixteenth and seventeenth headmasters of the Tanimura Ha. During the Taisho era (1912-1926), Oe began formally referring to his branch as the Muso Jikiden Eishin Ryu. In contrast, Nakayama Hakudo, the sixteenth headmaster of the Shinomura Ha, reformulated his curriculum in a slightly different way and gradually began using the term “Muso Shinden Ryu” for his line.
Source: Hall, D. A. (2012). Encyclopedia of Japanese Martial Arts. New York: Kodansha USA.