Around this period, Myoitsu operated Todaiji Temple as a high-ranked monk called Joza among the administrative positions called Sango, and in 794, he served as one of monks called Shokushu to take part in the memorial service of the main building Konponchudo in Mount Hiei.
この頃三綱のうちの上座として東大寺の運営にあたり、794年（延暦13年）には比叡山根本中堂供養の職衆をつとめている。