1. Ennin | Biography Ennin (793 -864), better known in Japan by his posthumous name, Jikaku Daishi , was a priest of the Tendai school of Buddhism in Japan, and its 3 rd Zasu (" Head of the Tendai Order "). Ennin was instrumental in expanding the Tendai Order's influence, and bringing back crucial training and resources from China particularly Esoteric Buddhist training, and Pure