"One" is the thirteenth single by Japanese singer Aimer, released on October 11, 2017 under SME Records. Written by Aimer (under her pen name "aimerrhythm") and Rui Momota, the single peaked at No. 2 on Oricon's singles charts and No. 3 on Billboard Japan's Hot 100.[1][2]
Aimer debuted the song at her Nippon Budokan concert on August 29, 2017, calling it her "first dance song." She explained that "One" was a new chapter in her career after her compilation album Best Selection "noir" ended with the song "zero."[3][4] The song expresses positivity and inspiration, with the "flag" as a symbol of starting over.[5]
Like her previous videos, Aimer herself does not appear on the music video of "One". The video, directed by Takeshi Maruyama, features dynamic shots of schoolgirls dancing, playing musical instruments, and performing synchronized flag dancing.[8][2][9][5]
^ ab"Aimer「ONE」歌詞の意味や曲に込められた想いとは" [Aimer "ONE" What is the meaning of the lyrics and the thoughts contained in the songs?]. Ririkata. 2018-03-27. Retrieved 2020-03-20.
^"Aimer、新曲MVに三木孝浩監督+女優・浜辺美波「繊細で儚い表情を」" [Aimer's new MV directed by Takahiro Miki + actress Minami Hamabe "A delicate and ephemeral look"]. BARKS. Japan Music Network. 2017-10-10. Retrieved 2020-03-20.