Japan's isolationist policy during the Edo period limited contact with the outside world but allowed for the development of unique cultural practices and traditions.

The Tokyo Marathon, first held in 2007, has become one of the most popular marathons in the world, with over 30,000 runners participating each year.

The Showa period, which lasted from 1926 to 1989, was marked by Japan's militarism and involvement in World War II.