Sword Art Online, created by Reki Kawahara in 2009, is a popular anime and light novel series that takes place in a virtual reality MMORPG world.

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 compact disc (CD) was co-invented by Philips and Sony in the 1980s and has since replaced vinyl records as the primary means of music storage.