The phrase itself comes from Japanese anime culture, where ohayo means good morning and oni chan is an affectionate term for an older brother, which explains why the clip feels instantly familiar to anime fans. As a short soundboard upload, it has circulated mainly through fan edits, reaction clips, and greeting memes rather than through a single film or series. Its appeal is simple and repeatable: a two-second greeting that is easy to drop into intros, morning posts, and playful videos, keeping it in regular use across anime and meme communities.