The Empire of Japan is an nation located in East Asia. Japan is bordered by Siberia to the north, and China to the south. It maintains maritime borders with the US by the Sea of Okhostk. The characters that make up Japan's name mean "sun-origin", which is why Japan is sometimes referred to as the "Land of the Rising Sun". The Greater Tokyo Area, which includes the de facto capital city of Tokyo and several surrounding prefectures, is the largest metropolitan area in the world, with over 30 million residents.