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.

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