In May 1882, half a year after joining the Ministry, he was appointed among 8 graduates from the same class at the University of Tokyo to be the first to work at the medical bureau of Department of War, Faculty of Medicine, and engaged in research of literature on the Prussian army hygiene system, and as early as March of the following year submitted the entire twelve volumes of his work "Isei Zensho Kohon" (Manuscript of Medical Science) to the public office.
入省して半年後の1882年（明治15年）5月、東京大学医学部卒の同期8名の中で最初の陸軍省医務局付となり、プロイセンの陸軍衛生制度に関する文献調査に従事し、早くも翌年3月には『医政全書稿本』全十二巻を役所に納めた。