Hōjō Masako
The priest Fushigi visited the location in 771 AD to worship the Kokūzō Bosatsu, and the mountain became a spot for "sangaku shinkō", a form of ancient mountain worship. Priest Ennin visited in 836 and Seichō-ji became a temple of the Tendai sect. The main hall was destroyed by fire caused by lightning in 1096, and was rebuilt by the Provincial Governor Minamoto Chikamoto. During the Kamakura period, Hōjō Masako established a two-story pagoda and a library containing over 4,000 sūtras in 1219.