He made additional corrections to the commentary known as 'Suigen-sho Commentary' on "The Tale of Genji," the work that his great-grandfather MINAMOTO no Mitsuyuki had started to compile and his grandfather MINAMOTO no Chikayuki had almost completed, and he also completed 'Genchu saihisho' (Secret Notes of the Suigen-sho).
曾祖父源光行によって始められ、祖父源親行の代にほぼ完成した「源氏物語」の注釈書「水原抄」に加筆、また「原中最秘抄」を完成して源氏学（『源氏物語』を探求する学問）の権威として家学の隆盛に力を尽くした。