Judo, a martial art that emphasizes throws and grappling techniques, was developed in Japan in the late 19th century and has become a popular sport around the world.

Tokyo is the capital of Japan and the largest city in the world by population, with over 37 million people in the greater Tokyo area.

The Meiji Restoration in the late 19th century saw the overthrow of the Tokugawa shogunate and the modernization of Japan.