"Shukuen" (宿縁; "Karma") is a song by the Japanese rock band Asian Kung-Fu Generation. The song was initially released on digital streaming platforms on January 18, 2023, with the full single releasing on February 8.The song was used as the 12th opening theme for the anime series, Boruto: Naruto Next Generations.

It is the fourth time the band has provided music for the Naruto franchise, after "Haruka Kanata", "Sore dewa, Mata Ashita", and "Blood Circulator".

On writing a new theme for the series, Gotoh joked in an interview with Billboard that the story has become "more complicated" than when he initially started reading Naruto in Weekly Shonen Jump. He also notes research is key when writing a theme song, and that he had to write this song without knowing the future of the story, though he hoped that "the main characters would overcome these obstacles thrown at them by fate" pointing out that the story would eventually circle back to a face-off between Boruto and Kawaki (which is how the Boruto series begins).

The single has two B-sides, "Weather Report", which is sung by their guitarist, Kensuke Kita, and "Nissaka Down Hill", which is a continuation of the band's 2008 album Surf Bungaku Kamakura, with tracks named after stations on the Enoshima Electric Railway.

All lyrics are written by Masafumi Gotoh.