In addition, he also wrote the first books on theories of Western-style painting in Japan, such as "Gaho Koryo" (Summary of Painting Laws) and "Gazu Rikai" (Understanding Painting) in September of 1778, which became the theoretical fulcrum point of Akita Ranga.
そのほかに1778年9月『画法綱領』、『画図理解』という日本最初の西洋画論ともいえる理論書を執筆しており、これは秋田蘭画の理論的支柱となっている。