J9 (an abbreviation of Jolin's Night) is the second remix album by Taiwanese singer Jolin Tsai (Chinese: 蔡依林). It was released on November 12, 2004, by Sony Music Taiwan. The album was in support of her debut concert tour, J1 World Tour, and contains remixes of tracks from her studio albums—Magic (2003) and Castle (2004)—and two new tracks, "Signature Gesture" and "The Threat of Single Person". The opening track, "Signature Gesture", reached number 61 on the Hit FM Top 100 Singles of the Year.

...
Wikipedia