The view from the top of Mt. Naka-Dake, at 5,000 feet elevation, is a major tourist destination. Inside the crater, a churning lake bubbles sulfurous gases. Visitors reach the summit by ropeway or car to see the fumes rising from the crater. Since the volcano is still active, bunker-like concrete shelters are provided around the crater, built after a dozen people perished in a sudden eruption some 50 years ago.
All photos from Ametsuchi, by Rinko Kawauchi (Aperture, 2013).