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Mt. Aso: Experience the world's largest caldera and spectacular scenery!

Mt. Aso: Experience the world's largest caldera and spectacular scenery!

What is Mount Aso?

Mount Aso is an active volcano located in Kumamoto Prefecture, known as a tourist destination with one of the world's largest calderas. This massive caldera, formed approximately 90,000 years ago, tells the history of volcanic activity and attracts many travelers. It remains an active volcano, allowing visitors to enjoy dynamic natural phenomena up close.


The Attractions of Mount Aso

1. One of the World's Largest Calderas

The caldera of Mount Aso boasts a vast terrain with a diameter of about 25 kilometers and a circumference of approximately 120 kilometers. From the summit, you can enjoy a panoramic view of the expansive landscape, offering an experience that feels like stepping into another world.

2. Kusasenri-ga-hama

Inside the caldera lies "Kusasenri-ga-hama," characterized by vast green grasslands and a lake. You can see grazing cows and horses peacefully wandering, allowing you to spend a relaxing time. Hiking and horseback riding experiences are also popular here.

3. Nakadake Crater

Located at the center of Mount Aso, Nakadake Crater allows you to observe volcanic smoke and the crater lake up close. Entry may be restricted depending on the volcanic gas conditions, so prior confirmation is necessary.

4. Beautiful Scenery in Every Season

In spring, fresh greenery, in summer, lush green fields, in autumn, landscapes dyed in golden hues, and in winter, snow-covered scenery can be seen. The seasonal beauty is one of the reasons to visit Mount Aso.

5. Aso Volcano Museum

This museum offers insights into the nature and volcanic activity of Mount Aso, allowing you to deepen your knowledge of the geology, flora, and fauna.


Access Information for Mount Aso

  • Location: Kurokawa, Aso City, Kumamoto Prefecture
  • Access:
  • Train: About 30 minutes by bus from JR Hohi Main Line "Aso Station" to the Aso Mountain West Climbing Road
  • Car: About 1.5 hours from Kumamoto City, about 2 hours from Oita City
  • Hours: Varies depending on volcanic activity (pre-confirmation required for the Nakadake Crater area)
  • Admission Fee: Free (some facilities may charge)


Recommended Activities Around Mount Aso

1. Aso Grassland Hiking

There are numerous hiking courses that allow you to experience the grandeur of nature while walking through the grasslands inside the caldera.

2. Relaxing in Hot Springs

The area around Mount Aso is dotted with hot spring resorts, offering a relaxing time unique to volcanic regions. Kurokawa Onsen is particularly famous.

3. Cycling and Driving

Touring the perimeter of the caldera by bicycle or car allows you to enjoy the magnificent scenery to its fullest.


Traveler-Friendly Information and Summary

Useful Information

  • Recommended Season: Spring and autumn are especially recommended. The climate is mild, and the natural beauty is prominent.
  • Clothing: Due to the high altitude, it can be cool even in summer. Be prepared for temperature differences.
  • Note: The areas around the crater may be closed depending on the volcanic gas situation. Please check the latest information on the official website.

Frequently Asked Questions

Q: Is Mount Aso safe?

A: Mount Aso is an active volcano, but a monitoring system is in place, and areas are closed according to volcanic activity. As long as safety measures are followed, you can enjoy your visit safely.

Q: Can I get to Mount Aso without a car?

A: Public transportation is also available. You can access it by combining JR trains and mountain buses.

Q: Is Mount Aso enjoyable for families with children?

A: Yes. There are many places that children can enjoy, such as Kusasenri-ga-hama and the museum.

Mount Aso is a special place where you can experience the grandeur of nature and the powerful activity of the volcano. Be sure to visit and feel its charm firsthand!



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