Maretu is a Japanese Vocaloid producer known for intense electronic songs built around Hatsune Miku's voice, and Uminaoshi is one of his tracks featuring her, while Coin Locker Baby is another widely shared Maretu song that fans often pair with it. Short vocal snippets from these tracks circulate on meme soundboards because they are instantly recognisable to Vocaloid listeners yet work without any context for everyone else. The clip's brevity makes it easy to drop into edits, reaction videos and short-form posts, keeping Maretu's distinctive vocal style in circulation long after the original songs were first shared online.