This grand caldera stretches 24km from north to south and 18km from east to west. It is surrounded by 4km of rocky surface created by spewing lava. At the center of the caldera nestled among the Aso Gogaku (the five mountains of Aso – Mt. Nekodake, Mt. Takadake, Mt. Nakadake, Mt. Eboshidake, Mt. Kijimadake) is Mt. Nakadake, an active volcano emitting smoke.

Although Mt. Aso itself is one of the largest craters in the world, this volcanic mountain alone is a massive crater by itself. It measures; a 600-meter diameter, a 130-meter depth, and a 4-kilometer circumference. You are most-likely to be overwhelmed with the dynamic landscape of this active volcano.

Access to the crater may be suspended due to an abnormal activity detected. Please be advised.