Diamond is the first Japanese album by the South Korean girl group 4Minute. It was released in Japan on December 15, 2010. It was released in two editions, regular CD only, and limited CD+DVD. The limited edition includes a 52-page photobook that highlights some of their single releases and Japanese debuts. The album sold 7,060 copies in Japan, peaking at the #27 spot in the Oricon weekly charts. The Korean edition of the album was released in January 25, 2011, but doesn't includes the Korean songs from their debut EP "For Muzik".