Saidai-ji is a temple in the city of Nara, Nara Prefecture, Japan. The temple was established by the order of Emperor Shotoku in 765. It is the head temple of the Shingon Ritsu sect of Buddhism. Saidai-ji is the counterpart to Todai-ji. Saidai-ji had many Buddhist pavilions , including two five-storied pagodas and was one of the great seven temples of Nanto(present Nara City). However, it declined at the early Heian period. Many buildings were lost by the fire or the typhoon. The temple was operated by Kofukuji at last. The priest Shakuson of the Kamakura period became a restorer of Saidai-ji. He rendered revival of ruined Saidai-ji for 50 years or more until he died at the age of 90.