One (Aimer song)

"One" is a song recorded by Japanese singer Aimer, released as a digital single on October 5, 2016. It is the lead track from her fourth studio album, daydream, which was released shortly after on September 21, 2016.

The song was written by TK from Ling Tosite Sigure, who also produced the track. The lyrics explore themes of loneliness, connection, and finding solace in shared experiences. Musically, "One" blends Aimer's signature vocals with TK's distinctive alternative rock sound, featuring a dynamic arrangement with soaring melodies and intricate instrumentation.

"One" achieved commercial success in Japan, charting on various digital platforms. The song also garnered critical acclaim for its emotional depth and innovative sound. It is considered one of Aimer's signature songs and a highlight of her daydream album.