Matsuoka Hoyoen Sanatorium

The or National Sanatorium Matsuoka Hoyoen is a sanatorium for leprosy and ex-leprosy patients situated in Aomori, Aomori, Japan that opened in 1909.
History.
The Japanese Government promulgated the first leprosy prevention law on March 19, 1907, which took effect on April 1, 1909. Japan was divided into 5 areas. The second area included Hokkaido, Miyagi Prefecture, Iwate Prefecture, Aomori Prefecture, Fukushima Prefecture, Yamagata Prefecture and Akita Prefecture. In this area, Aomori was selected for the sanatorium.
Foreigners who came into Japan after the Meiji Restoration(1868) were surprised to find leprosy patients in public areas in Japan. The Japanese Government was worried about the many leprosy patients among those who were examined for the draft at age 20.
Number of patients.
The following table shows the number of patients held at the Sanatorium in selected years.