From here you can access introductions to the geosites of Izu Peninsula by clicking the map of each area.
The information is updated sequentially.
Uomizaki Geosite is an area centered around two steeply rising coastlines called Nishikigaura and Sogaura that are located south of the Atami Spa. Many hotels and tourist facilities are built clinging to the steep cliffs of the rugged coast here, enabling the visitors to get a close look at the magnificent volcanic products and landforms from just about any place on the premises. Also, some parts of marine-cut terraces are used as the foundation for hotel buildings or open-air baths built right on the water’s edge.
Ito Spa is a site around the part of Ito city with hot spring inns and facilities, which have been loved by people from the old times.
Minomigaoka Lava Plateau, which is the location of Ito city office, offers a sweeping view of the hot spring town.
The South Jogasaki Coast Geosite is located in the north part of Jogasaki Coast and offers the visitor a beautiful landscape view woven by the intricate landforms formed by surface structure and columnar joints of the lava flow together with the sea down below.
Northern part of Jogasaki Coast Geosite is an intricate geographical feature formed by lava that was born when a large quantity of lava flowed into the Sagami Bay from the Omuroyama Volcano during its eruption about 4,000 years ago.
In the northern part of Jogasaki Coast, visitors can take a walk on the Jogasaki Picnic Track – a path offering a comfortable 3-kilometer walk along the coast.
In Omuroyama Volcano Geosite, visitors can enjoy the landforms of Omuroyama Volcano (designated by the government as national natural monument), which is the largest scoria cone among the volcanoes of Izu Tobu Volcano Group formed about 4,000 years ago, and the diverse landforms created by the volcano, which are visible from the top of the mountain.
Kawazu Higashiizu Area
The greatest attraction of the Kawazu Nanadaru Geosite is the magnificent view of waterfalls and the gorge formed by lava you will find here.
The highlights of the Hachinoyama Volcano Geosite are Hachinoyama Volcano (erupted about 36,000 years ago), which is one of the largest scoria cones of the Izu Tobu Volcano Group ranking second only to Omuroyama Volcano, and the picturesque and artful landforms created by lava that flowed from it.
In the Inatori Geosite, visitors can see a part of Inatori Volcanic Chain of over 6 kilometers in length, which was formed during a volcanic eruption 19,000 years ago, and lava and volcanic ash which were spewed out during the eruption.
At the Atagawa Hokkawa Geosite you can enjoy both the Atagawa and Hokkawa spas, and also the geographical features formed by the lava of Amagi Volcano on the coastline.
In the Tsumekizaki Geosite, visitors can enjoy the view of strata formed in the volcanic activity of the period when Izu was a submarine volcano, and the columnar joints formed when the magma, which penetrated into the underground strata, was cooling down and solidifying.
The attractions of the Shimoda Port Geosite are the landscape and the culture of the town, which has for a long time been a port, as the location is blessed with a large bay that is quite rare for Izu, and the strata formed by volcanic products of the submarine volcano that created the bay.
In the Kisami and Touji Geosite, volcanic products of submarine volcanoes are widely distributed all over the coast. There are also a number of sea caves in various places formed by erosion of the rocks by the waves, and in these caves there are places where the fossiliferous strata, proofs of the ancient upheaval, are clinging to the walls.
In the Mera and Koura Geosite, strata formed with the volcanic ash and pumice stone which were emitted from submarine volcanoes and the powerful magmatic dykes piercing right through them can be seen at many places in the cliffs of the coast.
Cliffs of the Okuirozaki Geosite offer the visitor many sights of strata formed with volcanic ash and pumice stone, which were emitted from submarine volcanoes, and the powerful magmatic dyke piercing right through them.
The Irozaki and Ikenohara Geosite offers the visitors not only the beautiful strata and volcanic necks formed by volcanic products of submarine volcanoes that one can see on the cliffs of the coast, but also the landforms created by Minamizaki, a terrestrial volcano.
In the Dogashima and Nishina Port Geosite, the visitor can see the beautiful strata and landscapes full of marks left from the period when Izu was a submarine volcano.
The Nishinagawa River and Hozoin Geosite offers splendid views of the strata of pillow lava and subaqueous volcaniclastic flow, which were emitted from submarine volcanoes.
In the Iwachi, Ishibu and Kumomi Geosite, visitors can see the strata of volcanic ash and subaqueous lava flow, formed during the time when Izu Peninsula was a submarine volcano.
Osezaki Heda Area
The Osezaki Geosite offers such points worthy of note as the dynamic strata formed by volcanic products of Osezaki Volcano, one of the large terrestrial volcanoes of the area, and the sand spit (Osezaki) formed by ocean currents.
Tanna Basin Geosite is a perfect location to see the landforms of Tanna Basin created as a result of volcanic activities of the Tanna Fault that continued over a long period of time. One of the points of interest is the Fault Park preserving the shift of the fault formed by the Northern Izu Earthquake and designated by the government as national natural monument.
Kurotake Geosite offers a sweeping view of Tanna and Tashiro basins formed by the movements of Tanna Fault that have repeatedly occurred in the past.
North Nakaizu Area
The most fascinating points of the Mt. Joyama and Katsuragiyama Geosite are the mountains, which in fact are the “neck” of a submarine volcano, and the beautiful columnar joints dotting the cliffs.
The Takatsukayama and Sukumoyama Volcanoes Geosite offers a view of the southernmost volcanic chain of the volcanoes of Izu Tobu Volcano Group.
The points of interest of the Shuzenji Spa Geosite is the thick pumice layer that was spurted out from submarine volcanoes, the volcanic necks with the famous Asahidaki Falls, and the hot spring resort with a long historic background best known for its Tokko-no-yu Spa.
The Shimoshiraiwa and Kadono Geosite is a perfect place to see the marks of the probably most important theme of the Izu Peninsula Geopark, the marks of the land’s activities telling of its northward journey.
South Nakaizu Area
The greatest attraction of the Namesawa Geosite is the landscape formed by lava of Namesawa Volcano.
In the Hachikuboyama Volcano Geosite the visitors can see the diverse volcanic landforms as well as lava and other volcanic products created by Hachikuboyama-Maruyama volcanic chain of volcanoes of the Izu Tobu Volcano Group, which erupted 17,000 years ago.
Mishima Geositeis covered with volcanic products of Mt. Fuji and Mt. Hakone, which were formed after the collision of Izu and Honshu, and is located on the boundary of Izu and the new volcanoes.
The lava flow coming from Mt. Fuji formed the land in northern Mishima, at the same time bringing in spring water and many other blessings.