Platinum 9 DISC (プラチナ ９ DISC) is Morning Musume's ninth original studio album, released approximately two years after their previous album, Sexy 8 Beat.

It was released on March 18, 2009 in both limited (EPCE-5629) and regular (EPCE-5631) editions.

The limited edition comes with a bonus DVD.

[1] The regular edition include one of ten photo cards, there is one for each member and one for the whole group.

All tracks are written by Tsunku