23^rd International Conference on Advanced Materials & Nanotechnology August 19-20, 2019 Tokyo, Japan

Tokyo is Japan's capital and the world's most populous metropolis. It is also one of Japan's 47 prefectures, consisting of 23 central city wards and multiple cities, towns and villages west of the city center. The Izu and Ogasawara Islands are also part of Tokyo. Prior to 1868, Tokyo was known as Edo. A small castle town in the 16th century, Edo became Japan's political center in 1603 when Tokugawa Ieyasu established his feudal government there. A few decades later, Edo had grown into one of the world's most populous cities. With the Meiji Restoration of 1868, the emperor and capital moved from Kyoto to Edo, which was renamed Tokyo ("Eastern Capital"). Large parts of Tokyo were destroyed in the Great Kanto Earthquake of 1923 and in the air raids of 1945.

Greater Tokyo is the world's most populous metropolitan area and is the center of Japanese culture, finance, and government. A bustling cosmopolitan city, Tokyo is also a major transportation hub and a world economic and industrial center. The city boasts a large number of world-class institutions of higher education, the highest concentration of universities in Japan. Tokyo was known as Edo until 1868, when the Japanese imperial family was moved there from Kyoto. Metropolitan Tokyo is generally defined as the four prefectures of Tokyo, Saitaima, Kanagawa, and Chiba, while the city of Tokyo proper usually refers to the 23 wards in Tokyo prefecture itself. The metropolitan area includes the major cities of Yokohama (the second largest city in Japan), Kawasaki, and Chiba, as well as rural mountain regions west of the city, the Izu Islands outside Tokyo Bay, and the Bonin Islands to the southeast in the Pacific Ocean.

Today, Tokyo offers a seemingly unlimited choice of shopping, entertainment, culture and dining to its visitors. The city's history can be appreciated in districts such as Asakusa, and in many excellent museums, historic temples and gardens. Contrary to common perception, Tokyo also offers a number of attractive green spaces in the city center and within relatively short train rides at its outskirts.