When he was 27 years old, he bought "Sendai Kyujihongi" and "Kojiki", read KAMO no Mabuchi's book, and started studying Japanese classical culture.
27歳の時、『先代旧事本紀』と『古事記』を書店で購入し、賀茂真淵の書に出会って国学の研究に入ることになる。