光田健輔
He was born in Kōchi Prefecture in 1884. When he was studying laws, he was interested in leprosy since a woman he knew developed leprosy. He asked Kensuke Mitsuda for advice, and studied medicine at Tokyo University following his advice. He worked in the Institute of Infectious Diseases and invented Murata's method for serodiagnosis of syphilis. In 1926 he assumed the post of the director of Osaka Prefectural Sotojima Sanatorium. In 1928, he was one of the founders of the Japanese Leprosy Association, together with Mitsuda.