Diamond (4Minute album)

Diamond is the debut Japanese studio album by South Korean girl group 4Minute. It was released in Japan on December 15, 2010 in two editions: CD only and limited edition CD+DVD. The limited edition includes a 52-page photo book that highlights some of the group's single releases and Japanese debuts. The album peaked at number 27 on Japan's weekly Oricon Albums Chart and sold over 12,000 copies.

Singles
A Japanese version of the song "Muzik" was released on May 5, 2010 as the first single for Diamond. 4Minute previously released the song in Korean in 2009. The Japanese version reached number 21 on the Oricon Singles Chart, selling 8,234 copies. It also charted at number 36 on the international sub-chart of South Korea's Gaon Digital Chart.

On July 28, 2010, 4Minute released the album's second single, a Japanese version of the group's 2010 single "I My Me Mine". It reached number 26 on the Oricon Singles Chart. The single sold 4,742 copies the first week, selling over 10,945 copies in total. The single also charted in South Korea at number 47 on the international Gaon Digital Chart.

The third and last single from the album is "First", which was released on October 27, 2010 as a double A-side with the non-album track "Dreams Comes True." "First/Dreams Come True" reached number 28 on the Oricon Singles Chart, while "First" charted at number 9 on the international Gaon Digital Chart in South Korea.

Track listing
Lyrics credits feature both the Japanese and the original version where appropriate. They also include "rap making". Music credits feature the composers and arrangers.