Tokyo is the capital of Japan and one of its 47 prefectures. The Greater Tokyo Area is the most populous metropolitan area in the world.[8] It is the seat of the Emperor of Japan and the Japanese government. Tokyo is in the Kant? region on the southeastern side of the main island Honshu and includes the Izu Islands and Ogasawara Islands.

Tokyo has numerous outlying islands, which extend as far as 1,850 km (1,150 mi) from central Tokyo. Because of the islands' distance from the administrative headquarters of the metropolitan government in Shinjuku, local offices administer them. A busy day spent exploring must-see attractions, including Tokyo Disney Resort, Tokyo DisneySea, and Odaiba.

Tokyo has enacted a measure to cut greenhouse gases. Governor Shintaro Ishihara created Japan's first emissions cap system, aiming to reduce greenhouse gas emission by a total of 25% by 2020 from the 2000 level.[70] Tokyo is an example of an urban heat island, and the phenomenon is especially serious in its special wards.[59][71] According to the Tokyo Metropolitan Government,[72] the annual mean temperature has increased by about 3 °C (5.4 °F) over the past 100 years. Tokyo has been cited as a "convincing example of the relationship between urban growth and climate.

Tokyo has many museums. In Ueno Park, there is the Tokyo National Museum, the country's largest museum and specializing in traditional Japanese art; the National Museum of Western Art and Ueno Zoo. Other museums include the National Museum of Emerging Science and Innovation in Odaiba; the Edo-Tokyo Museum in Sumida, across the Sumida River from the center of Tokyo; the Nezu Museum in Aoyama; and the National Diet Library, National Archives, and the National Museum of Modern Art, which are near the Imperial Palace.

Tokyo has many theatres for performing arts. These include national and private theatres for traditional forms of Japanese drama. Noteworthy are the National Noh Theatre for noh and the Kabuki-za for kabuki.[92] Symphony orchestras and other musical organisations perform modern and traditional music. Tokyo also hosts modern Japanese and international pop and rock music at venues ranging in size from intimate clubs to internationally known arenas such as the Nippon Budokan. Japan is an island nation in the Pacific Ocean with dense cities, imperial palaces, mountainous national parks and thousands of shrines and temples. .