The Yashu Tongu entry comes from a user-generated soundboard where it sits in the games section, and no original source, character, or recording date is documented for it. With only a handful of views, it has not spread as a named meme, so its life is purely functional: editors searching for extremely short transitional blips can grab it as an MP3 and drop it into timelines. Its staying power comes from utility rather than fame, since sub-second accents never really go out of style in fast-cut video.