Pump it Up Rebirth is a Korean only release in the popular dance game series, and includes 36 new songs as well as an improved interface. Two new game modes were introduced: Division and Half-Double. The Division mode was dropped from the series after PIU: The Premiere 2, with no other versions offering this mode. Nonstop Remix mode was not included in this release.
PIU: The Premiere 2 was released internationally shortly after PIU: Rebirth, and included all the new songs as seen in Rebirth plus the majority of songs from PIU: The Premiere. Thus, Rebirth is made completely obsolete by Premiere 2 other than the fact that some aspects of Rebirth are in Korean rather than English.