After that, he successively filled posts as director of Shiyaku (medical and pharmaceutical test) in the Health and Medical Bureau of the Ministry of Education and manager of both the Tokyo Shiyakujo and Osaka Shiyakujo (national medical and pharmaceutical products test laboratory organization), but retired from that work because he was prone to illness and after that, he devoted himself to literary work.
その後、文部省衛生局司薬監督、東京・大阪両司薬場長を歴任するが病気がちのために退官して、以後著述活動に専念した。