Japanese amusement park in a shopping mall in Tokyo: Let's go for a walk around an amusement park built in the middle of a shopping mall close to the center of Tokyo in beautiful Japan. Vic Stefanu, vstefanu@yahoo.com. Tokyo, is one of the 47 prefectures of Japan, and is both the capital and most populous city of Japan. The Greater Tokyo Area is the most populous metropolitan area in the world. It is the seat of the Emperor of Japan and the Japanese government.