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.
The Walkman, invented by Sony in 1979, revolutionized personal music listening by allowing users to listen to music on the go.
The karaoke machine, which was invented by Daisuke Inoue in 1971, has become a popular form of entertainment worldwide.
