Hirokoto was also monjosho, and after serving as Dazai-fu shokan (Minor Judge at Dazai-fu offices), he received the investiture of Jugoinoge (Junior Fifth Rank) and Chikugo no kuni no kami (the governor of Chikugo Province).
文章生、太宰府少監を務めた後、従五位下筑後国守となる。