"Contrail" is a song by Japanese recording artist Namie Amuro, taken from her eleventh studio and second Japanese–English bilingual album Feel (2013).

The singer was approached by the Tokyo Broadcasting System team to record the official theme song for their television series Flying Public Relations Office, which resulted into the process of "Contrail".

The track was written, composed, arranged and produced entirely by long-time collaborator Nao'ymt, and recorded at Daimonion Studios in Shibuya, Tokyo.

"Contrail" receive positive reviews from music critics, many who highlighted it as one of the album's best tracks, and complimented the production and songwriting.

An accompanying music video for the single was shot in downtown Los Angeles, California, at Pershing Square, which featured Amuro walking through the city with children.

In March 2013, Japanese network Tokyo Broadcasting System (TBS) approached and asked Amuro if she could record a theme song for their 2013 television series Flying Public Relations Office, which she accepted.

[1] In an interview with Tokyo Broadcasting System (TBS), Amuro stated that the song represented the "positive views of the world".

"[1] Nao'ymt furthered commented to TBS that the song is about looking forward and letting go of the past; he went on to complimented Amuro's "strong" vocals and professionalism.

A member from Japanese magazine CD Journal's commended Nao'ymt's production and songwriting, and went on to praise him for "exhausting" the "goodness" out of Amuro's vocal abilities.

Another review with CD Journal complimented Amuro's vocals and the song's background piano composition, claiming it to be "dramatic".

"[30] Additionally, the entire set was situated in specific areas in Los Angeles, and required police from the region to blockade the roads and bridges; this became a heavy topic within the Japanese media at the time.

As close-up shots of Amuro finish by the end of the bridge section of the song, the camera pans towards rainbow-colored clouds, which makes the citizens become more gleeful.

The final chorus has Amuro and the children dancing and singing at Pershing Square, surrounding by several lighting effects and rainbow-colored clouds.

Several scenes of the clouds start to float within the city, above and near skyscrapers, and the video ends with Amuro, the children, and the citizens smiling.

[35] A year later, Amuro added the song into her annual Live Style concert tour during the second segment, and as the seventh track in the set list.

[37] Furthermore, the track was used as the theme song to the Tokyo Broadcasting System (TBS) television series Flying Public Relations Office (2014), as mentioned above.