Beatmania Append 4thMix: The Beat Goes On was released by KCEJ on September 9th, 1999. This is is the countpart version of the arcade game beatmania 4thMIX. It has a total of 30 songs, 23 from beatmania 4thMIX and 7 from 3rdMIX and completeMIX. Since this is an Append release, it needs another beatmania title to act as a key disc to boot the game. First beatmania APPEND game that uses its own independent memory card slot for save data. Previous beatmania APPEND games, as well as all BONUS EDIT games, use the same memory card slot as beatmania CS / beatmania APPEND YebisuMIX; only one of the aforementioned games can share that slot.