| 1．Mount Usu |
| Mount Usu (有珠山, Usu-zan[3]) is an active stratovolcano in the Shikotsu-Tōya National Park, Hokkaido, Japan. It has erupted four times since 1900: in 1910 (which created Meiji-shinzan[4]), 1944–45 (which created Shōwa-shinzan), August 7, 1977,[5] and on March 31, 2000. To the north lies Lake Tōya. Mount Usu formed on the southern rim of the caldera containing the lake. |
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| 2．Lake Tōya ・Iburi Subprefecture, Hokkaidō |
| Lake Tōya (洞爺湖, Tōya-ko) is a volcanic caldera lake in Shikotsu-Toya National Park, Abuta District, Hokkaidō, Japan. It is part of "Toya Caldera and Usu Volcano Global Geopark" which joins in Global Geoparks Network. The stratovolcano of Mount Usu lies on the southern rim of the caldera. The lake is nearly circular, being 10 kilometers in diameter from the eastwest and 9 kilometers from the northsouth. The town of Tōyako comprises most of the area surrounding the lake and the town of Sōbetsu is located on the eastern side. |
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| 3．Tōyako, Hokkaido |
| Tōyako (洞爺湖町, Tōyako-chō) is a town in Iburi Subprefecture, Hokkaido, Japan. It was formed on March 23, 2006, through the merger of the town of Abuta and the village of Tōya. As of 1 October 2020[update], the town has an estimated population of 8,442, and a population density of 47 persons per km2.[1] The total area is 180.54 km2. |
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