The clip is taken from History of Japan, Bill Wurtz's fast-paced 2016 YouTube explainer that compressed thousands of years into nine minutes of jokes, jingles and deadpan narration. Short vocal fragments from the video became popular as standalone reactions because each line was recorded cleanly and could work without context. This one-word extract circulated on soundboards and in edits where creators needed a brief, recognisable aside. Its continued use comes from that contrast between an educational topic and a completely throwaway delivery online today.