is a song recorded by Japanese singer Kenshi Yonezu. Released on April 8, 2024, via Sony Music Records, it serves as the theme song for the asadora series The Tiger and Her Wings.
On April 1, 2024, the song was announced as the theme song for the asadora series The Tiger and Her Wings and to be released on April 8.
The song debuted at number 2 on the Billboard Japan Hot 100 for the week on April 20, 2024.
The music video was directed by Tomokazu Yamada. It features Kenshi Yonezu in a shoulder-padded power suit and is set at an A&W diner and unwinds in a whirlwind of events preceded by a reverse playback of the video.
Yonezu debuted the performance of "Sayonara, Mata Itsuka!" at the 75th NHK KÃ Âhaku Uta Gassen on December 31, 2024, as part of special shows. It was set as a spinoff of The Tiger and Her Wings that Sairi Ito (portrayed Tomoko Inotsume) called out "Yone-san" to appear. Yonezu performed the song on the large staircase as appearing on the series alongside casts of the series who danced on the background. At the end Yonezu and Ito stood side by side and gave a peace sign, before saying "Happy New Year" during waving their hands.