What Is the Unzen Volcanic Area Geopark, and How Do You See Its Eruption Sites?
This guide is for visitors who want to understand the volcano behind Unzen and see the places where its eruptions can still be read in the land. It follows the English pages of the Unzen Volcanic Area UNESCO Global Geopark, the Unzen Tourist Association and Japan's National Parks site. We read them on 2026-10-04. Facilities change their days and hours, so check before you go.
What the geopark is
The geopark's own site says that UNESCO Global Geoparks are single areas with geological heritage of international significance, managed through protection, education and sustainable development. It says Unzen Volcanic Area is one of eleven Japanese geoparks with the UNESCO designation, and that UNESCO geoparks are re-evaluated every four years. The geopark site adds that it was established in 2009 as one of the first geoparks in Japan. Within a geopark, places of interest are called geosites. The association says Unzen Jigoku and Heisei-Shinzan are certified geosites.
What there is to see
The geopark site says visitors can observe traces of volcanic activity on the peninsula from about 4.3 million years ago up to the Heisei eruption. It names geosites such as the Shin'yake lava flow, the amphitheatre wall of Mount Mayuyama created by the 1792 collapse, and the submarine volcanoes Mejima and Iwadosan. It also lists cultural sites such as terraced farms and a stone pagoda for the victims of the 1792 disaster, and natural sites such as the azaleas around Nita Pass.
The 1792 catastrophe
The geopark describes the Shimabara Catastrophe of 1792 as the worst volcanic disaster in Japanese history. Its earthquakes and landslides changed the town of Shimabara, and the evidence is still clear in the landscape. The association's history list also records that Mayuyama collapsed in a large earthquake and caused a huge tsunami. The geopark offers a recommended route to trace the catastrophe, which starts at the Mt. Unzen Volcano Museum.
The Heisei eruptions of 1990 to 1995
The geopark calls these a sobering reminder of the dangers of living close to the volcanoes. It lists memorials on a route that includes the Memorial Park of the Houses Destroyed by Debris Flows, the former Onokoba Elementary School, the farthest reaching point of the pyroclastic flow, the Heisei Shinzan Nature Center and the Senbongi Observatory.
The national parks site describes the Heisei Shinzan Nature Center as standing in a volcanic landscape warped by a pyroclastic flow from the 1991 eruption of Mount Fugen. Its exhibits cover the eruptions, the formation of Heisei-Shinzan peak, volcanic geology and how nature recovers. A deck behind the centre gives a view of Mount Heisei-Shinzan. The centre is closed on Tuesdays, or the following day if Tuesday is a holiday, and on December 31 and January 1. The association's FAQ also mentions a road station in Minami Shimabara with a preserved house from the eruption disaster.
Other recommended routes
- The route to enjoy onsen and springs, which includes an Obama Hot Spring stroll, an Unzen Jigoku stroll, the second observatory at Nita Pass and a Shimabara spring water stroll.
- The route to explore the origins of the peninsula, for those interested in geology.
- The route retracing people's lives, in the north of the peninsula, which links history and geography through sites such as Yamada Castle Ruins Park and the Unzen Historical Museum.
Visiting safely
The national parks site says Mount Heisei-Shinzan is off-limits because of unstable lava blocks, though you can view its steam from Mount Fugen (1,359 metres). The association notes that the autumn leaves forest on Fugendake is a national natural treasure, and says there is concern about what a future eruption would do to it. Follow the association's hiking rules and ask at the Unzen Mountain Information Center before you set out.
What we could not verify, and therefore left out
- Opening hours and admission fees at the museums and visitor centres other than the closing days above.
- How to travel between the stops on each route. The geopark's access page is only a list of links.
- Current volcano and trail conditions.
Related guides
- How do you get to Unzen Onsen from Nagasaki Airport, Nagasaki Station and Fukuoka?
- What is Unzen Jigoku, and what is the Nita Pass Ropeway like through the four seasons?
Sources
All URLs retrieved 2026-10-04.
- What is a Geopark? (Unzen Volcanic Area UNESCO Global Geopark) — (definitions, the eleven Japanese UNESCO geoparks)
- Highlights (Unzen Volcanic Area UNESCO Global Geopark) — (geosites)
- Recommended Routes (Unzen Volcanic Area UNESCO Global Geopark) — (1792 and Heisei routes)
- History of Unzen (Unzen Tourist Association) — (the 1792 collapse)
- Common question (Unzen Tourist Association) — (geosites, road station)
- Heisei Shinzan Nature Center (National Parks of Japan) — (the 1991 pyroclastic flow, closing days)
- Explore Unzen-Amakusa National Park (National Parks of Japan) — (Heisei-Shinzan is off-limits)
- Nita Pass ropeway (Unzen Tourist Association) — (autumn leaves forest)