初音ミク -Project DIVA- (Hatsune Miku -Project DIVA-) (also known simply as Project DIVA, and abbreviated as PD) are a series of video games by SEGA starring Hatsune Miku, along with other fellow Crypton VOCALOIDs, including popular derivatives. The premise of the game is rhythm action and players need to press a certain sequence of buttons to keep in play.
A member of the Japanese idol group Hello!Project, Yui Ogura (小倉唯), provided the motion capture for Hatsune Miku. Though started in 2009, the 初音ミク -Project DIVA- franchise is one of SEGA's longest-lasting franchises, and one of the few that still has games being made. Miku has then since become one of SEGA's mascots, as well as (alongside her fellow Crypton Vocaloids) an official and copyrighted SEGA character.
The game involves the use of the X, Circle, Triangle, Square and Arrow buttons to tap with the Rhythm.