Known for his prodigious scholarship he delved into the text 'Shakumakaenron' (annotated 10 volume translated Mahayana Buddhism text brought back from Tang China by Buddhist priest Kaimyo of Daian-ji Temple during his Nitto Guho [a pilgrimage to China in search of the Law]) coming to the conclusion it was a fake, which influenced the dispute between Saicho and Tokuitsu of Aizu.
高い学識で知られ、大安寺戒明が入唐求法で請来した「釈摩訶衍論」を調べてこれを偽書と判定し、最澄と会津の徳一との論争に影響を与えた。