This was one of the more prominent branch schools in Toga Village. The full name was Toga Elementary School Kitamamedani Branch School 利賀小学校北豆谷分校. And apparently it continued to operate as a school until 1968. The whole area of Toga Village
https://ja.wikipedia.org/wiki/%E5%88%A9%E8%B3%80%E8%B0%B7
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