His work ranged from compiling "Dainihonshi" (Great history of Japan) with an order from Mitsukuni, repairing and examining "Nasu no Kuni no Miyatsuko no Hi" (one of the three oldest stone monuments, designated as a national treasure), and also doing the practical work associated with the construction of Minatogawa-jinja Shrine.
光圀のもとで『大日本史』の編纂に携わり、那須国造碑の修復と調査、湊川神社の建立の実務を行なった。