The exact recording behind this clip is uncredited on the soundboard, but oyasumi is a staple of anime culture, the soft goodnight exchanged at the end of countless series and streams. Like other short anime voice clips such as tuturu and the onii-chan greeting, it spread through anime meme pages, Discord servers and TikTok edits, where creators use it as an affectionate sign-off. Because it is only a few seconds long, it survives easily as a shareable audio meme, and it remains popular as a gentle way to close late-night content.