Mount Naeba (苗場山, Naeba-san) is a stratovolcano[1] on the border of Nagano and Niigata prefectures in central Honshū, Japan. It is about 200 km (124 mi) from Tokyo. It was active between 200,000 and 800,000 years ago.[1] It is primarily made of andesite.[1]
^ abc"NAEBA-SAN". Quaternary Volcanoes of Japan. Geological Survey of Japan, AIST. 2006. Archived from the original on 2012-07-22. Retrieved 2008-12-21.