Vocaloid is a singing synthesizer. Its signal processing part was developed through a joint research project led by Kenmochi Hideki at the Pompeu Fabra University in Spain in 2000 and originally was not intended to be a full commercial project. Backed by the Yamaha Corporation it developed the software into the commercial product "Vocaloid".

The software became very popular in Japan upon the release of Crypton Future Media's Hatsune Miku Vocaloid 2 software and her success has led to the popularity of the Vocaloid software in general. Inside of Japan, the software has proven to be popular overall, with thousands of original songs by artists across Japan. Japanese video sharing website Nico Nico Douga played a fundamental role in the recognition and popularity of the software. A user of Hatsune Miku and an illustrator released a much-viewed video, in which "Hachune Miku", a super deformed Miku, held a Welsh onion (Negi in Japanese) and sang the Finnish song "Ievan Polkka" like the flash animation "Loituma Girl", on Nico Nico Douga.

Pandora Hearts (Pandora Hātsu) is a manga series by Jun Mochizuki. Originally starting serialization in the shōnen magazine GFantasy published by Square Enix in June 2006. Currently seventeen volumes have been released in Japan. The manga series was licensed for an English language release by Broccoli Books but has been dropped; it has been licensed by Yen Press since then. It has also been made into an anime version, produced by Xebec. On February 11, 2010, NIS America announced it would release the anime of Pandora Hearts in North America. This series also had 9 OVAs, which aired from July 24, 2009 to March 25, 2010.

Hatsune Miku: Project DIVA is a rhythm game created by Sega and Crypton Future Media for the PlayStation Portable featuring the virtual-diva Vocaloid Hatsune Miku.