"All Night Long" (stylized as "all night long") is a song recorded by Japanese singer Ami Suzuki for her debut studio album, SA (1999). It was written and produced by Japanese producer and songwriter Tetsuya Komuro. The track was released following Suzuki's two collaborative efforts with Komuro. "All Night Long" premiered on November 5, 1998 as the third single from the album.

Musically, the track was described as a drum and bass and pop song. Upon its release, "All Night Long" garnered positive reviews from music critics and was praised for its composition and production. It also achieved success in Japan; it was Suzuki's highest charting single on the Japanese Oricon Singles Chart, until it was surpassed by "Be Together" (1999). The song has sold over 396,000 units in Japan, Suzuki's seventh best selling single in that region.

The accompanying music video for "All Night Long" was shot in Japan; it features Suzuki inside a club with friends, and running around an empty bowling alley. At the 1999 Japan Gold Disc Awards, "All Night Long" and Suzuki won the awards for the Gold Disc Prize and Best New Artist respectively. For additional promotion, the song featured on Suzuki's concert tours: 1st Concert Oh Yeah! 1999, Amigo's Parlor Shake Shake Shake, and Ami-Go-Round Tour amongst others. "All Night Long" was re-recorded and re-produced for Suzuki's second greatest hits album, Ami Selection (2011).

After the spontaneous success of Ami Suzuki's single's "Love the Island" and "Alone in My Room", Japanese producer and composer Tetsuya Komuro had written, produced, composed, and arranged Suzuki's next single "All Night Long". Like "Love the Island" and "Alone in My Room", Suzuki did not incorporate her last name and only used Ami as her stage name. Songwriter Marc Panther re-wrote portions of the track so it could include the English language. It was selected as the third single from SA, and was released on November 5, 1998 by True Kiss Disc, a sub-division of Japanese record label SMEJ Associated Records.

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