Complex polymetallic mine which produced Pb, Zn, Cu, Ag until it closed in 1962. Veins hosted in propylitized hornblende-augite andesite, tuff, tuff breccia and shale of the Miocene Kunnui Formation. Major producer of Pb-Zn from normal mesothermal veins; Cu and minor Au, Sn, Bi, In, Se, Te, came from complex "telescoped" veins containing both high- and low-temperature mineralization (eg: Ohsawa vein).
