The North Nakaizu Area is located at the central part of the peninsula. This area is composed of a variety of geosites which are also of fundamental importance as far as the geological heritage of the geopark is concerned.
The Shimoshiraiwa site is known for a large calcerous sandstone deposit from the deep marine stage of the Izu Peninsula, and fossils of small marine organisms called the Lepidocyclina foraminifera are found in this rock. The fossils are dated to 11 million years back, and they provide a major evidence that this part of the land was once located in a warmer souttherly latitude.
Asahidaki waterfall is an intriguing site–you can see a waterfall that flows over columnar joints that formed underground when the volcanic massif itself was under water.
Mt. Joyama is another popular presence–the hard rock wall of the 342 m tall modest mountain is a popuar rock climbing destination. The Joyama Katsuragiyama Hiking Trail is also popular. Joyama and Katsuragiyama are ancient volcanic necks that were uplifted.
Finally, the Sukumoyama-Takatsukayama-Chojagahara cinder cones form the southern rim of the Izu Tobu Monogenetic Volcanic Chain. They erupted 131000 years ago, and you can see some spectacular depositional strata in these volcanoes.
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. Here one can also often observe the beautiful stripes formed by the yellow and orange pumice layers accumulating in this area from the volcanic eruption of Hakone Volcano.
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.