"Haruka" (ハルカ) is a song recorded by Japanese music duo Yoasobi. It was released on December 18, 2020 as a digital single, and was based on Tsuki Ōji (月王子), a novel by Osamu Suzuki from the Tokyo FM's radio program Jump Up Melodies Top20 on, which Yoasobi made a guest appearance. The song describe about a encounter and farewell, drawn from the perspective of "something" that has watched over the growth of a girl more than anyone else.