NanaOn-Sha (株式会社七音社 Kabushiki-Gaisha Nana On-Sha) is a Japanese video game company which created what is widely credited as the first modern rhythm game, PaRappa the Rapper. It was founded by: Masaya Matsuura in 1993. The game's success resulted in the spinoff UmJammer Lammy, which is based on guitar samples, and eventually a proper sequel, PaRappa the Rapper 2. NanaOn-Sha also produced another novel music game, Vib-Ribbon, but released the game only in Japan and Europe.
"Nana On Sha" roughly translates into "seventh sound company" from Japanese.