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

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.

Death Note, created by Tsugumi Ohba and Takeshi Obata in 2003, is a popular manga and anime series that follows a high school student who gains the power to kill anyone whose name he writes in a special notebook.