Tenkiu circulates online as a short, meme-style thank-you clip rather than as a line tied to a widely documented film, game or television scene, so its exact original recording is not clearly established in public sources. That ambiguity has not stopped its spread, because the clip is easy to recognise, easy to drop into a video and instantly understood even without context. It thrives in short-form edits, reaction videos and livestreams, where a single second of playful gratitude can close a moment, reward an audience or turn an ordinary thank you into a joke that viewers want to reuse.