有明海
Saga is located in the southeast part of Saga Prefecture. After the 2005 merger the city became very long north to south, bordering the Ariake Sea to the south and Fukuoka Prefecture to the southeast and north. The northern half of the city contains the Sefuri Mountains. Saga can also be regarded as within the Greater Fukuoka metropolitan area, and by extension, Fukuoka-Kitakyushu Metropolitan Area.