Introducing Izu Archipelago
The Izu Islands (伊豆諸島; Izu-shotō) comprises peaks of a submerged volcanic chain extending 300km into the Pacific. Although easily reached by ferry from Tokyo, the islands feel worlds away and not many tourists make it here. Soaking in an onsen while gazing at the Pacific is the classic Izu Islands activity, as is hiking up the mostly dormant volcanoes and along the pristine beaches.
Note the islands can get very crowded during summer and most onsen are mixed bathing requiring swimsuits. For more information on the whole chain, see www.tokyo-islands.com.