Zozan Underground Imperial Headquarters
At the end of World War II, in preparation for a coming decisive battle on Japan’s mainland, the military authorities planned to move their headquarters and government agencies underground in Matsushiro; thus, they constructed underground bunkers in the mountains, such as Maizuru-yama, Minakami-yama, and Zozan. (Only about 500m of the Zozan underground bunker is open to the public)