Kagoshima today with volcano Sakurajima in background.As of 1 January 2005, the city had an estimated population of 605,650 and a density of 1,107.81 persons per km². The total area is 546.71&_160;km². In 2003, the city had an estimated population of only 554,136 and density of 1,911.41 persons per km². The total area was 289.91 km². The city's total area nearly doubled between 2003 and 2005 as a result of five towns—Koriyama, Matsumoto, Kiire, Sakurajima, and Yoshida—merging into Kagoshima on 1 November 2004.
Kagoshima is approximately 40 minutes from Kagoshima Airport, and the city features large shopping districts and malls, is served by trams, and has many restaurants featuring Satsuma Province regional cuisine kibi (a kind of tiny fish), tonkatsu (caramelized pork, as opposed to the breaded version encountered elsewhere in Japan), smoked eel, and karukan (sweet cakes made from steamed sweet potatoes and rice flour). A large, modern aquarium has been installed on the old docks overlooking the volcano. The Senganen (Isoteien) Japanese garden is just outside the city.
The St. Xavier church is a reminder of the first Christians who came to Japan.