 The epicenter of the Great Kantō earthquake in 1923 was deep beneath Izu Ōshima Island in Sagami Bay.It devastated Tokyo, the port city of Yokohama, surrounding prefectures of Chiba, Kanagawa, and Shizuoka Prefectures, and caused widespread damage throughout the Kantō region.Ninety percent of the buildings in Odawara collapsed immediately, and fires burned the rubble along with anything else left standing.