YouTube Theme Song 2

"YouTube Theme Song 2" is a song by Japanese musical duo Hikakin & Seikin. It was released by Uuum Records on August 14, 2025, as their eighth digital-only single. This song is a remake of the 2015 single "YouTube Theme Song."

Background

Prior to the release of this song, Hikakin had been counting down from mid-July of the same year on his YouTube channel and on X's header image until August 14, the day before the music video was released. On August 13, the day before, Hikakin posted a video titled "Regarding the fuss I've been causing " in which he said the following:
The music video was released on the YouTube channel "HikakinTV" at 7pm on August 14. It is the first release in 10 years since the previous song, "YouTube Theme Song." In the comments section, Hikakin said the following about the song:
Additionally, Seikin said: