Tsugaru Peninsula
Nakadomari is in Kitatsugaru District of Aomori Prefecture, and consists of two discontinuous geographic areas in northern Tsugaru Peninsula. The larger area is in the south, and consists of the former town of Nakasato. The smaller area is in the north, and consists of the former village of Kodomari with a coastline on the Sea of Japan at the western end of Tsugaru Strait. The Kodomari Dam is located in the town.