"Utsuroi" (移ろい, "Changing") (stylized UTSUROI) is the 49th Japanese CD single by South Korean pop duo Tohoshinki, first digitally released by Avex Trax on July 31, 2022, and then as a CD single on August 17, 2022.

"Utsuroi" was released in three physical versions – a standard CD only version, a limited photobook edition, and a fanclub edition released exclusively for Tohoshinki's Japanese fan club, Bigeast.

Promoted as a summer single, "Utsuroi" is described as a medium-tempo ballad song reminiscent of Japanese city pop, accompanied by a vocal harmony.

Lyrically, the song is about cherishing one's closest friends, and to strive towards a better future together.

A preview of the song was revealed on YouTube on July 13, which also included a teaser trailer for the album jacket's photoshoot.