The Korean peninsula is located in Northeast Asia. It is surrounded by the ocean on three sides, making it a unique geographical location. With Seoul as its capital city, the landsite is roughly 1,030 km (612 miles) long and 175 km (105 miles) wide at its narrowest point. Korea's total land area is 100,033 square km, neighboring Japan to the east, China to the west, and sharing a northern border with Democratic People's Republic of Korea (North Korea).