Mount Aso-Japan
It is also known as Aso Volcano and this sense is the largest active volcano in Japan. And is among the largest in the world, Common use relates often only to the somma volcano in the center of the Aso Caldera. It stands in Aso Kuju National Park in Kumamoto's situation, on the island of Kyushu. Its tallest peak, Takadake, is 1,592 meters 5,223 ft above sea level. Mount Aso is in an impartially large caldera 25 kilometers 16 miles north-south and 18 km 11 mi east-west with an extremity of around 120 km 75 mi, although sources vary on the exact distance.
The present Aso Caldera formed as a result of four huge caldera explosions occurring over a range of 90,000–300,000 years ago the caldera, one of the largest in the world, accommodates the city of Aso as well as Takamori and Minamiaso confined the caldera extends about 18 km east to west and about 25 km north to south.