Shinsei Shōnin

Shinsei Shōnin (sometimes spelled Shinzei, 真盛, 1443–1495), was a priest of the Tendai school during the Sengoku period (period of warring states). He was the founder of the Shinsei School (天台真盛宗) of Tendai. His shigo (posthumous title) was Enkai Kokushi ("National Teacher of Perfect Command") and Jishō Daishi ("The Great Teacher Jishō").

Shinsei is primarily associated with his attempts to revitalize Tendai nembutsu practice in response to the new Japanese Pure Land schools which had split off from Tendai, mainly the Jōdo-shū and Jōdo Shinshū.