One Piece, created by Eiichiro Oda in 1997, is a popular manga and anime series that follows the adventures of a group of pirates as they search for the ultimate treasure.

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

The Showa period, which lasted from 1926 to 1989, was marked by Japan's militarism and involvement in World War II.