He found a kindred spirit in Kozen URAMATSU, who was a biological younger brother of Sukeki HINO that had fallen into obscurity due to the Horeki Incident, and became his vassal, and then he helped Kozen write "Daidairizu Kosho" (The Evidential Research of the Outer Palace Precincts).
日野資枝の実弟で宝暦事件で逼塞していた裏松固禅と意気投合してその家臣となり、『大内裏図考証』の執筆を助けた。