His father, Norimori, was called Kadowakichunagon and the heir, Michimori, also was conferred jugoinoge (Junior Fifth Rank, Lower Grade) and appointed a kurodo (keeper of imperial archives) at a tender age, and after that he obtained repeated promotions smoothly.
父の教盛は門脇中納言と呼ばれ嫡男の通盛も幼くして従五位下・蔵人に任じられ、順調に昇進を重ねる。