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

Naruto, created by Masashi Kishimoto in 1999, is a popular manga and anime series that follows the adventures of a young ninja as he strives to become the strongest ninja in his village.

The Kamakura period, which lasted from the 12th to the 14th century, was a time of political upheaval and marked the rise of the shogunate.