"Zankyōsanka/Asa ga Kuru" (残響散歌/朝が来る) is the twentieth single by Japanese singer Aimer, released "Zankyōsanka" on December 6, 2021, later released "Asa ga Kuru" on January 12, 2022 both under SACRA MUSIC. The song serves as the opening and ending songs of Demon Slayer: Kimetsu no Yaiba – Entertainment District Arc. She also performed "Zankyōsanka" on THE F1RST TAKE.