Uwajima is a city situated in southwestern Ehime Prefecture, Japan, positioned along the wide rias coastline of Uwa Bay on the Seto Inland Sea. Surrounded by mountains on three sides and facing remote islands to the east, it serves as the western terminus of the JR Shikoku Yosan Line. Although geographically south-southeast of Yawatahama, its status as a rail terminus leads many to consider it the westernmost city in the prefecture.