The robotic pet, such as Sony's Aibo, has become a popular form of entertainment and companionship for people who cannot keep real pets.

Shonen Jump, a weekly manga magazine published by Shueisha, has been a major influence on the development of anime and manga culture in Japan, and has produced many popular anime series such as Dragon Ball, One Piece, and Naruto.

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