Volcanic Ash Layer near the Mikagawa River(Mikagawa-no Kazanbai-so)


Evidence of massive volcanic eruptions in ancient times

You can see a volcanic ash layer along a section of the Ohechi route of the Kumano Kodo; the ash accumulated here are some of those ashes that were released during a series of massive eruptions that occurred 27,000 to 29,000 years ago in a volcanic system in Kagoshima Prefecture called the “Aira Caldera.” A signpost that indicates the location of this ash layer stands near the entrance gate to the forest trail, which is located close to the Mikagawa River.


Ago, Shirahama Town
Season / Time zone
Spring Summer Autumn Winter / Daytime
Weather conditions
Sunny Cloudy
Frequency of appearance


Take the Shirahama Town Community Bus and get off at “Mikagawa”[三ケ川] stop. (Reservation needed. The bus does not operate on Sundays or public holidays.) It is 45 minutes’ walk from the stop.

* To make a reservation to ride the Community Bus, please call the Shirahama-daiichi-koutsu (0739-42-2916, Japan).

Recommended spot

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