"Tsubame" (ツバメ, "swallow") is a song by Japanese duo Yoasobi, featuring children group Midories, from their second EP, The Book 2 (2021).

[3] The winning story was announced on July 9, titled Chiisana Tsubame no Ōkina Yume (小さなツバメの大きな夢, "A Big Dream of a Small Swallow"), written by 15-year-old Nana Ototsuki, from a total of more than 700 works.

"[5] The group formed by NHK, called Midories, was also announced on the same day, consists of five elementary school students from the first to the fifth grades—Atsuki, Ukyou, Lexie, Ririna, and Yumeri—to feature vocals of the song with Yoasobi.

[7] On October 1, 2021, Yoasobi announced their second EP, The Book 2, which included their singles released that year, and added two tracks "Tsubame" and "Moshi mo Inochi ga Egaketara", a theme of the stage of the same name.

[9][10] The full song was first aired at the duo's radio show Yoasobi's All Night Nippon X on October 19[11] and played at several places in Japan before release, including Lawson, FamilyMart, Ministop, Matsuya, Sukiya, Shibuya Center Gai, and Takeshita Street.

[12] A cover artwork for "Tsubame" depicts a painting of a swallow flying toward the city in the distance, designed by Nina Ai, who also teamed up with "Yoru ni Kakeru", and "Gunjō".

The "World version" music video premiered via NHK E's Aokiiro on November 7, featuring characters from Sesame Street and children from 23 countries supported by Japan International Cooperation Agency (JICA).

[6][11] Yoasobi gave a debut performance of "Tsubame" with Midories for the first time at music show Songs on December 2, 2021, alongside "Loveletter", and "Taishō Roman".

[29] A cover of "Tsubame" by Japanese ska and jazz band Tokyo Ska Paradise Orchestra, featuring Midories, Neru Nagahama, and Tokyo Metropolitan Katakura High School brass band club, was released digitally on May 11, 2022, alongside the performance video, for the special edition Minna no Uta, Minna no Uta: Hirogare!