Kagoshima City is located in the central part of Kagoshima Prefecture at the southern tip of Kyushu, Japan, bordering Kagoshima Bay in the east, and the eastern half across the sea from Sakurajima also belongs to Kagoshima City, with a city area of 289 square kilometers and a population of about 570,000. The urban area is located on a small plain alluvial by seven small rivers, surrounded by terraced fields piled up by sand dunes, with an altitude of 100 to 300 meters. Sakurajima, which is famous as a symbol of Kagoshima City, is at an altitude of117 meters, and is located on the other side of the bay 4 kilometers away from the urban area. In recent years, active volcanic activity is frequent.