This is the largest copper mine historic site in Japan. It has 1300 years of history and you can get a close look of the remains of mining. You can also study its history and mining technology while walking through 1.7 kilometers tunnel. This is the place you can enthusiastically learn about mining.

This building is established in 1910 as a welfare facility of Kosaka Mine. This is a half-Japanese and half-Western style wooden theatre. A clapboard style is adopted in the front exterior. That is painted in white. There are double-hung windows and serrated decorations which are lined up regularly. About the interior, there are tulip-shaped lamps on the ceiling. As you can see the octagon framework inside, it can be said that it is an elaborate western-style building. The tradition of Edo period is remained strongly in the gallery, two stage passages, the cut-out hole, the revolving stage and so on. Even now, many customers enjoy the regular performances and Kabuki play by famous actors.