Atami City is the northern gateway to the Izu peninsula. A bullet train ride from Tokyo brings you to Atami in less than an hour. The city is known for its famous hot springs. The specialty of this area are numerous cliffs by the seaside–which form a precipitous line of land. Roads wind through these cliffs and hotels stand on the edge of the precipice. A nice place to start your Izu tour and understand how volcanic depositions eroded over time create this area.
Old submarine volcanic layers belonging to Yugashima and Shirahama groups are found in this area. In the 1930s, the famous volcanologist Hisashi Kuno conducted pioneering research on the soil groups of this region and identified Yugawara, Taga and Usami volcanic depositions. These volcanoes were active immediately after Izu’s collision with the mainland and their activities go as far back as a million years.
Today, these volcanoes form gentle slopes due to erosion, except for the cliffs that drop precipitously into the sea.