He was also known as a researcher of the "Genji Monogatari" (The Tale of Genji), and taught Yoshinari YOTSUTSUJI much about it (according to the "Kakai-sho Commentary" Preface).
更に『源氏物語』の研究家として知られ、四辻善成に『源氏物語』を伝授した（『河海抄』序）。