The Tenshikan was built in cooperation with the Kosaka mine in 1931 as a kindergarten for the children of local miners. An order of Christian nuns ran the kindergarten which influenced the western aesthetic of the building. Clapboard siding, vertical sliding windows, and roof decorations are just some of the features that put the Tenshikan on par with the Kosaka Mine office and Korakukan Theater.
An educational display about the history of the Tenshikan and a multi-purpose room are open to visitors.