In the 12th century, the samurai class emerged in Japan, with warriors serving as protectors for the aristocracy.

The Allied occupation of Japan following World War II brought about major political and social changes, including the drafting of a new constitution and the abolition of the samurai class.

Neon Genesis Evangelion, created by Hideaki Anno in 1995, is a popular anime series that explores themes of psychology, philosophy, and spirituality, and has become a cult classic.