Genshin devoted himself to the development of Western studies as a Ranpoi and was also involved in the compilation of the Halma Wage (Dutch-Japanese Dictionary based on the dictionary by Halma), the first Dutch-Japanese dictionary in Japan.
玄真は蘭方医として蘭学の発展に尽くし日本初の蘭日辞書ハルマ和解の編纂にも参加。