Harasho comes from Love Live School Idol Project, the idol anime series that began in 2013, where student council president Eli Ayase became known for the expression. Because Eli has Russian roots, the phrase stood out from the rest of the cast's dialogue and was quickly isolated by fans into clips and soundboards. Fans often group it with other single-word anime catchphrases like tuturu, sharing both as instant reaction buttons. Its brevity and unmistakably happy tone have kept it circulating in edits, streams and fan communities long after the original scenes aired.