Hirayasumi Opening Theme Is a New Song by Gen Hoshino; Netflix Worldwide and U-NEXT Streaming Confirmed

The opening theme of the Hirayasumi TV anime is a new song that Gen Hoshino wrote for the series. The official website announced it on November 9, 2026. The song title has not been announced yet. The ending theme is "Fumi Zekka" by TOMOO, covered in the November 2 article.

According to the official website, Hoshino wrote the song after an enthusiastic request from the anime's production team. His past anime theme songs include "Doraemon" for the Doraemon anime and "Kigeki" for the SPY x FAMILY anime.

Original creator Keigo Shinzo commented that he was delighted Hoshino would once again make a theme song for one of his works, as he did for the film Moriyamachu Driving School. Having heard the recording ahead of time, Shinzo said it is "a really, really good song." According to the official website, Hoshino's full comment is in the music section of its top page.

Also on November 9, it was announced that the series will stream worldwide on Netflix and on U-NEXT from January 2027. The streaming start date and time have not been announced. The broadcast is scheduled on NHK General TV from January 2027; the day and time have not been announced either. See the work page for more about the series.