He was selected as Myobo tokugyosho (a distinguished law student who won a scholarship) in 815 and became Myobo hakase (Professor of Law) in 830 and daihanji (a higher-rank judge) later.
弘仁6年（815年）に明法得業生となり、天長7年（830年）に明法博士となり、後に大判事に遷る。