In the Nara period, three ceremonies were emphasized including the Gosaie Ceremony inside the palace, Yuima-e Festival in Kofuku-ji Temple and Saisho-e Ceremony at Yakushi-ji Temple, and in the Heian period the three ceremonies emphasized were Daijo-e at Hossho-ji Temple, Saisho-e at Enshu-ji Temple and Hokkekai, and monks who mastered all three ceremonies were called Sanei-koji (also called Sane-koji or Koji for short).
奈良時代には宮中の御斎会・興福寺の維摩会・薬師寺の最勝会、平安時代には法勝寺の大乗会・円宗寺の最勝会・法華会の3つの法会が重要視され、この3つの法会の講師を務めた僧は三会已講師（さんえいこうじ、略して三会已講、已講ともいう）と称された。