Tokyo is the capital of Japan and a major administrative, financial, cultural, and industrial center. It is located in the southeastern part of Honshu Island, in the Kanto Plain, on the tip of Tokyo Bay in the Pacific Ocean. The population is 12.544 million people, the area is 2,187 km², and the population density is the highest among Japan's prefectures — 5,740 people/km². Tokyo is the city with the highest Gross Domestic Product (GDP) among world capitals.