Mount Iō, Active volcano in Mishima, Japan
Mount Iō rises to 704 meters above sea level and consists of rhyolitic rock formations that shape its distinctive geological structure.
The volcano forms an integral part of the Kikai Caldera system, with documented volcanic activity continuing through 2013 in the Kagoshima Prefecture.
The mountain's name translates to 'Sulphur Mountain' in English, reflecting the natural sulfurous gases that emerge from its numerous vents.
Guided tours lasting five hours operate during winter months from December to February, with an entry fee of 33,000 yen per person.
The mountain's surface features yellow sulfur crystal formations and active fumaroles that release continuous streams of volcanic gases.
Location: Mishima
Elevation above the sea: 704 m
Made from material: rhyolite
Part of: Kikai Caldera
GPS coordinates: 30.79301,130.30526
Latest update: March 23, 2025 12:27
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