Beautiful World (Hikaru Utada song)

"Beautiful World" is a song by Japanese American musician Hikaru Utada. It served as the theme song for Evangelion: 1.0 You Are (Not) Alone, the 2007 film reboot of the anime Neon Genesis Evangelion. It was released as a double A-side single on August 29, 2007 along with her song "Kiss & Cry", which had been released digitally three months earlier. The song was written and co-produced by Utada, while Akira Miyake and the singer's father Teruzane Utada served as producers. In 2009, a remix of the song, "Beautiful World (Planitb Acoustica Mix)" served as the theme song of the second film in the series, Evangelion: 2.0 You Can (Not) Advance.

Musically, "Beautiful World" is a pop song that incorporates elements of house music, dance and trance. Lyrically, it delves upon themes of love and desire, being inspired by the character Shinji Ikari. Upon its release, "Beautiful World" received positive reviews from music critics, who commended Utada's lyrical abilities and production style; it won numerous accolades in Japan, and has subsequently been listed as one of her best releases.

Commercially, "Beautiful World" and "Kiss & Cry" experienced success in Japan. The single reached number two on the Oricon Singles Chart and was certified platinum by the Recording Industry Association of Japan (RIAJ) for shipping over 250,000 physical copies. "Beautiful World" individually sold over one million legal downloads and 500,000 ringtones throughout Japan, earning it a million and double platinum certification from the RIAJ. Utada has since performed the song on her Wild Life concert tour and additionally placed the recording on compilation albums such as Utada Hikaru Single Collection Vol. 2 (2010) and Science Fiction (2024).