"Love, Day After Tomorrow" is a song recorded by Japanese singer Mai Kuraki, taken as the lead single of her debut studio album Delicious Way (2000). It was released on December 8, 1999 via Giza Studio and Tent House in two physical editions; a CD single and 12" vinyl. The track was written by Kuraki herself, while production was handled by Kanonji. The conception of the song started after the commercial failure of her English language single "Baby I Like", which led to her American label Bip! Records to send her back to Japan, and she subsequently reverted back to the Japanese market.

Musically, "Love, Day After Tomorrow" is a pop recording that incorporates elements of R&B and teen music, and lyrically discusses about themes of love. Upon its release, the single received positive reviews from music critics, who praised the singles commercial quality and production, but some noted similarities to another rising Japanese artist, Utada Hikaru. Commercially, it experienced success in Japan, reaching number two on the Oricon Singles Chart and was certified million by the Recording Industry Association of Japan (RIAJ) for shipments of one million copies. Despite not charting in North America, it sold over 5,000 copies.

An accompanying music video was directed and released in December 1999, where it featured the singer in a white/black room and shared intercut scenes with various locations in New York City and Japan. In order to promote the single, Kuraki performed it on several nationwide concert tours, and additionally added it to greatest hits albums including All My Best (2009) and Mai Kuraki Best 151A: Love & Hope (2014). Since its release, it has become the singer's best-selling single and has sold over 1.385 million units in Japan, ranking it among many other best-selling entries.

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