"Single Again" (Japanese: シングル・アゲイン, Hepburn: Shinguru Agein) is the 18th single by Japanese singer-songwriter Mariya Takeuchi.

Written by Takeuchi and produced by Tatsuro Yamashita, the single was released through Moon Records on September 12, 1989.

[1][2][3] "Single Again" was used as the eighth opening theme of NTV's Kayō Suspense Gekijō (火曜サスペンス劇場, Kayō Sasupensu Gekijō, Tuesday Suspense Theater).

The song is about a woman's feelings when she hears rumors of a divorced man marrying another woman, thus making her feel "single again".

[6] All tracks are written by Mariya Takeuchi^ Shipments figures based on certification alone.