city, Shizuoka ken (prefecture), east-central Honshu, Japan. It is located on the east coast of the Izu Peninsula on Sagami Bay. Although its hot springs were discovered in the late 16th century, the city did not develop as a resort until the arrival of a railway line from Atami in 1938. Itō is now the second largest spa on the peninsula (after Atami), with almost 400 hot springs. It is also an important fishing port and market for the mandarin oranges grown to the west. Historic monuments include the Otonashi Shrine to which the shogun Minamoto Yoritomo was banished in 1160. Much of the area around Itō is within Fuji-Hakone-Izu National Park. Pop. (2005 prelim.) 721,435.