Izu

Izu refers to a geographic region in Japan that includes the Izu Peninsula in Shizuoka Prefecture and the Izu Islands to its south. The peninsula extends roughly 90 kilometers into the Philippine Sea and is bordered by Suruga Bay to the west. It is known for rugged coastlines, beaches, hot springs, and volcanic landscapes shaped by ongoing tectonic activity. The Izu region sits along the boundary where the Philippine Sea Plate is subducted beneath the Eurasian Plate, a setting that contributes to geothermal features and seismic activity.

Geography and geology: The peninsula features a varied interior with low mountains and numerous hot-spring towns. Coastal scenery includes cliffs, coves, and cape areas, such as the Jogasaki coast. The climate is generally mild, with warm summers and cool winters, and it receives a relatively high amount of rainfall.

Economy and culture: Tourism is a major part of the Izu economy, centered on hot springs (onsen), beaches, and marine activities such as diving and fishing. Popular destinations include resort towns along the coast and historic hot-spring districts. The Izu Islands lie to the south of the peninsula and form a separate geographic and administrative unit under Tokyo Metropolis, known for volcanic terrain, subtropical vegetation, and ferry or air links to the mainland.

Transportation: The peninsula is served by the Izukyū Line, a private rail line running along the coast between Atami and Ito, along with JR lines. National routes provide road access, and ferry services connect to some of the Izu Islands.