Yokohama is Japan's second-largest city and a major port city located south of Tokyo, with a population of over 3.7 million people.

The karaoke machine, which was invented by Daisuke Inoue in 1971, has become a popular form of entertainment worldwide.

Nagoya is Japan's fourth-largest city and a major industrial center, with a population of over 9 million people in the greater Nagoya area.