Josho (906 - 983) was a Shingon Sect Buddhist monk who lived during the mid-Heian period. His father was FUJIWARA no Morotada, Minister of the Left. His name is also written with different Chinese characters and he is also known as Saga Sozu and Ichijoin Sozu.
He studied the Hosso Sect teachings under Ninko of Kofuku-ji Temple and consecrated by Kanku before being appointed betto (administrator) of Daikaku-ji Temple. Josho was promoted to Gon-Risshi (generally in Shingon sect, fifteenth-ranking Buddhist priest, literally, "supernumerary master of discipline") in the year 966 and ascended to the rank of Daisozu (the highest rank of Buddhist priesthood) in the year 979. In addition, he was successively appointed chief abbot of To-ji Temple, betto (administrator) of Kofuku-ji Temple and zasu (head priest) of Kongobu-ji Temple as well as founding the Ichijo-in sub-temple of Kofuku-ji Temple. In his final years, he devoted himself to the recitation of the Lotus Sutra.