Mizuno clan
After the 300th anniversary of the Jōkyō Uprising, the local people decided to build a memorial museum to commemorate the uprising, and to preserve historic archives of the uprising. To that end they selected a building site of the museum right across the street from "Jōkyō Gimin-sha" (Jōkyō Gimin shrine), a Shinto shrine dedicated to twenty-eight executed farmers and the Mizuno clan (who were the local "daimyōs" at the time of the uprising), and the former Tada family homestead (a cultural asset of Nagano Prefecture). It is located in the former village of Nakagaya (in the Matsumoto Domain during the Edo period), where Tada Kasuke was village headman in the late 17th century.