Not only is Mount Aso the biggest active volcano in Japan, but it ranks amongst the largest to be found anywhere in the world. The total circumference of the outer rim is no less than 128 kilometres and is served by a ropeway.

It is not always possible to access the crater due to eruptions and the emission of gases, making the times when visits are granted all the more special. The volcano is situated within the Aso-Kuju National Park, spanning the Kumamoto and Oita national parks, where there are plenty of fascinating sites to visit.

The local volcanic activity has led to a large number of hot spring villages being set up within the park, allowing weary bodies to relax. The largest of these is Aso Uchinomaki-onsen-kyo, where there are in excess of 100 hot springs to choose from.