Climate change has changed the Arctic. The Arctic ice is melting rapidly as the result of global warming. It changed the international relationships of the region and beyond. To compete for emerging Arctic shipping routes and abundant oil, natural gas and other natural resources, China, Japan and South Korea have managed to get involved in this area. The three countries are taking multilateral and bilateral diplomatic approaches simultaneously to strengthen their influence in the Arctic. So far, the three countries are acting independently, even to the extent of direct competition. The Arctic vital geostrategic position can easily lead to military tension. But as a matter of fact, the three countries actually share common interests in the Arctic, which can bring cooperation instead.