NiNa is a group from Japan. Their logo is spelled with two upper case "N"s on all official releases.

The group formed in early 1999 when YUKI took a small absence from her mega-star band JUDY AND MARY. YUKI meet up with Kate Pierson and the two started to write lyrics together. Because of this the music was primarily written in English. The music was very experimental. It ranged from soft ballads, funky pop songs, and unusual electronic arrangements.

On July 14th 1999 the group released their first single, Happy Tomorrow. The single managed reach the ninth position on the Oricon and chart for a total of fourteen weeks. Their second single was released exactly three months later and didn't fair as well as the first. Aurora Tour reached the tenth position on the Oricon and charted for only five weeks. Not even a month had passed and the first album was released. The self-titled NiNa topped the charts at the number three position and charted for a total of eleven weeks. After this the band soon split to return to all of the other projects.