In August 1957, he was appointed director of Nagashima Aiseien Sanatorium following the retirement of Kensuke Mitsuda.
He reported that the total number of leprosy in-patients who developed during service was 732; 0.13 per 1000 mobilized.
If other conditions were included, he estimated that an average of 100 patients developed leprosy among soldiers and sailors per year.
Another point he stressed was that only 3 officers developed leprosy, while all others were soldiers and sailors.
It was one year prior to the publication of the first edition of the Handbook of Leprosy by William Jopling.