Tokyo is Japan's largest city and the world's most populous metropolitan area, with over 37 million people.

During the Edo period, which lasted from the 17th to the mid-19th century, Japan was ruled by the Tokugawa shogunate and experienced a period of peace and stability.

The Heian period, which lasted from the 8th to the 12th century, was a time of great cultural and artistic achievement in Japan.