The Aso Nakadake Caldera
Nakadake (1506 m) in the center of Mt. Aso is a volcano that continues to be active. You can see the volcanic crater up close. There are seven craters in Nakadake, and the first crater is currently active and can be seen. It can be reached near a huge crater with a circumference of about 4 km. When the gas clears, you can see the emerald green lake at the bottom of the crater, which is filled with 50 ~ 60 °C hot water.
The day before we left, I checked and was worried that we might not be able to go up the mountain because of restrictions. Early that morning, we learned that the restrictions had been lifted and the area was open. The surprise of being able to visit the crater of Mount Aso's Nakadake was beyond words.
It was my first time standing this close to the edge of an active volcanic crater. Deep inside the enormous crater, emerald blue-green magma churned and bubbled, while billowing white smoke carried the pungent smell of sulfur. Compared with the tranquil, distant blue of Okama at Mount Zao in Tohoku, which I had visited before, the violently breathing Mount Aso before me felt more like the beating heart of the earth. It was astonishing.
The domed emergency shelters along the trail silently reminded us of nature's unpredictability. Just after we finished marveling at this incredible work of nature, an alarm sounded because the volcanic gas concentration had spiked, and we immediately returned to the visitor center. Looking back as the staff once again put up the barriers and closed the entrance, I felt even more grateful for that brief, fleeting encounter. An active volcanic site that is well worth visiting.


































































