This is a wetland area in the Kirigamine Highlands. Being close to the obsidian mines of places such as Wada Pass, there were plenty of stone materials available for the many stone tools made around this wetland. Articles excavated from this area are stored and on display at the Suwa City Museum. These wetlands are a nationally designated Natural Monument.
Yashima Wetlands in Shigakirigamine Suwa City/Shimosuwa-machi Nagano