Mio Oshima Island (Cape Nagasakibana)
The island of Oshima reaches up to 60 meters and has a circumference of about 1 km. It is part of the same rhyolite formation that makes up Cape Nagasakibana on the opposite shore. The seemingly countless columnar joints make for an amazing sight.
- Postal Code
- Mio, Shin-onsen Town, Mikata County, Hyogo Prefecture
- Shinonsen Town San'in Kaigan Geopark Center 0796-82-5222