Genbudo Park is located in Toyooka City, Hyogo Prefecture.
It features one of Japan’s most remarkable natural formations: columnar basalt created by volcanic activity about 1.6 million years ago.
The site is historically significant as it inspired the geological term “basalt.”
With gentle walking trails, hydrangeas blooming in June, and easy access from Kinosaki Onsen,
Genbudo Park offers a perfect blend of scenic beauty, scientific interest, and cultural charm.
※This article is part of our English-language travel series for international visitors.
Formation and Geological Background
Genbudo, located in Hyogo Prefecture, is a geological formation created by volcanic activity approximately 1.6 million years ago. As the lava cooled and contracted, it formed a striking pattern of columnar joints shaped like hexagonal pillars.
The perfectly aligned, black and solid basalt columns resemble carefully carved sculptures, and the site is regarded as one of Japan’s most notable geological landscapes. Today, the area is maintained as Genbudo Park and is open to the public as a place to appreciate both nature and earth science.
Scientific and Cultural Significance
Genbudo is an important site in the field of geology and is widely known as the origin of the term “basalt.” The name was inspired by rocks collected here in the late 19th century, which contributed to the naming of this volcanic rock in scientific terminology.
The area also features five main caves—Genbudo Cave, Seiryudo Cave, Byakkodo Cave, Kita Suzakudo Cave, and Minami Suzakudo Cave—each named after the Four Symbols of Chinese mythology: Genbu, Seiryu, Byakko, and Suzaku. This cultural context adds further depth to the site’s appeal.
Official Designation and Conservation Efforts
Genbudo was officially designated as a National Natural Monument in 1931, recognizing its exceptional geological features and scenic value. Since then, it has been under legal protection to preserve its unique landscape.
In recent years, it has also become a key site for geopark activities, promoting geological and environmental education in the surrounding area. The park collaborates with schools and research institutions to offer visitors opportunities to learn about the Earth’s history and geological formations.
In 2022, Genbudo was selected as one of the 100 Geological Heritage Sites of the World by the International Union of Geological Sciences (IUGS), a UNESCO-affiliated organization. This recognition highlights Genbudo’s exceptional scientific and educational value on a global scale.
Admission Fees
- Adults: ¥500
- Students: ¥300
Access and Visitor Information
Genbudo Park is located in Akaishi, Toyooka City, Hyogo Prefecture. It is approximately 10 minutes by car from Kinosaki Onsen Station and 15 minutes by car from Toyooka Station. The park is well-maintained and easily accessible, making it a convenient destination for travelers.
It takes about 30 minutes to walk up the stairs and visit all the caves, so wearing comfortable walking shoes is recommended.
Every year in June, the park hosts the Hydrangea Festival, a popular seasonal event that celebrates the harmony of local nature and culture.
- Address: 1347 Akaishi, Toyooka, Hyogo 668-0801, Japan
- Access: About 10 minutes by car from Kinosaki Onsen Station / 15 minutes from Toyooka Station
- Official Website: https://genbudo-park.jp/
River Ferry Information
※A river ferry is also available from Genbudo Station.
- Fare:
- Adults: ¥1,000
- Children: ¥600
- Infants: ¥400
- Ride Duration: Approximately 10–15 minutes
- Schedule: Operates 4 times a day at fixed times
- Capacity: Limited seating due to the small size of the boat
- Notes: Service may be canceled in case of bad weather
