📜 One of the world's largest volcanic calderas, designated as Aso Kuju National Park and a UNESCO Global Geopark.
🔍 Home to an active volcano, Nakadake, and 16 inactive peaks, formed by eruptions 90,000–300,000 years ago.

Why Go

🌋 Witness the smoking, steaming Nakadake Crater
🏞️ Explore vast ancient grasslands maintained for over 1,000 years
♨️ Enjoy natural hot springs and geothermal energy
🌸 See Kyushu Azalea and other rare flowers (late May-early June)

Why Avoid

⚠️ Active volcano, access restrictions and safety bunkers in place
💨 Gas emissions can cause sudden closures

🕒 Hours

Access to West Crater varies by season:
Mar 20 – Oct 31: 8:30 AM – 5:30 PM
Nov 1 – Nov 30: 8:30 AM – 5:00 PM
Dec 1 – Mar 19: 9:00 AM – 4:30 PM
Extended during holidays.

ℹ️ Visitor Center

Free entry, 9:00 AM – 5:00 PM daily.
Exhibits on geology, wildlife, culture, and disaster prevention.