Onsen resorts in Aso
Aso possesses the world’s largest Caldera with 18km west-east and 24 km north-south,
created by 4 times of explosive volcanic activity in the ancient time, 3 million years ago.
Surrounding the caldera is the world’s largest outer mountain, and there are 5 mountains.
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There are many Onsen resorts where are located mountain foot of outer mountain.
Onsen resorts are;
Takamori, Minami-Aso, Tarutama, Toshinoki, Akamizu, Uchionomaki, and Kurokawa