During the reign of Emperor Shomu, Kiminari was appointed to Jugoinoge (Junior Fifth Rank, Lower Grade) (on April 22, 746 on the old calendar) and then to Shimotsuke no kuni no kami (the governor of Shimotsuke Province) (on March 12, 748 on the old calendar).
聖武天皇の御世に従五位下へと叙せられ（天平18年4月22日(旧暦)）、その後下野国守に任ぜられた（同20年3月12日(旧暦)）。