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

Japan has a game show called "Human Tetris" where contestants have to contort their bodies to fit through holes in a moving wall.

The sushi conveyor belt, invented in the 1950s, revolutionized the way sushi is served in restaurants and made it more accessible to the average person.