He was a fervent believer of Nichiren sect of Buddhism (Kenpon Hokke sect) and it is said that he converted almost all temples in the territory to the Nichiren sect within several years after he suppressed the northern Kazusa Province.
熱心な日蓮宗（顕本法華宗）の信者であり、上総北部の平定後数年で領内のほとんどの寺院を日蓮宗へと改宗させたと伝えられている。