Updated at 2022-03-28
Sanukte rock is a volcanic rock that produces pleasant chimes. Formed in lava deposits after volcanic eruptions, it was named "multi-stone matrix bronze pyroxene andesite" by German mineralogist Weinschenk in 1891. However, because of its origin in Sanuki, the rock was commonly referred to as Sanukitoid. The rock resonates a crisp and pleasant sound when beaten with a mallet, so it was bestowed the nickname "kan-kan ishi" by the Japanese people.
Agreement date: July 18, 2016
Area: 1,876.77 square kilometers
Population: Approx. 942,840
Main industries/features: Tourism, industry, commerce, agriculture, fisheries