Research in Japan concerning the health and welfare of children, including mentally impaired children, has a history dating back to the latter half of the Meiji Era (1868-1912). During the early stages of its development, the Japanese Society of Child Research played a significant role, and Hiraku Sandaya (1881-1962), a pediatrician, was a central figure in this process. In this study, Sandaya's lectures were divided into four periods (period I 1902-1907; period Ⅱ 1908-1913; period Ⅲ 1914-1924; period IV 1925-1936), and analyzed to obtain insight into his level of involvement with the Japanese Society for Child Research.
This study found that in all Sandaya conducted 47 lectures, representing 4.7% of all lectures held by the Japanese Society for Child Research. During period Ⅲ (1914-1924), meetings by the Japanese Society for Child Research held west of Osaka represented 70.4% of all meetings held by the society, suggesting that Sandaya was largely involved in the society's activities west of Osaka. However, during period lV (1925-1936), Sandaya's lectures decreased significantly tothree, all of which were held in his local region. Accordingly, this study concludes that during period IV, Sandaya distanced himself from the Japanese Society for Child Research, which was mainly active in the Kanto area, and focused on applying child research to direct practice.
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