The Izu peninsula is a large mountainous peninsula with a deeply indented coastline to the west of Tokyo on the Pacific coast of the island of Honshū, Japan.
Formerly known as Izu Province, Izu peninsula is now a part of Shizuoka Prefecture. A popular resort region for tourists from the Kantō region, the Izu peninsula is primarily known for onsen hot spring resorts in Atami, Shuzenji, and Itō.
The area is also popular for sea bathing, surfing, golfing and motorcycle touring. The peninsula abuts Mount Fuji and is a part of Fuji-Hakone-Izu National Park.