I wonder if youtube has the NHK2 evening sign-off? Slowly turning globe, portentous version of Kimi ga Yo*, sweet motherly voice at end telling you to beware of fires. Trouble is I don't know what one calls the sign-off: it'd be the closing or end theme in anime. (Googling which got me the end theme to an anime called Welcome to the NHK. How out of loop I am, now that nobody tapes shows off TV, and one must have an updated OS to troll the anime channels.)
Of course, it's probably changed since the 90s.
*I mean, all versions of Kimi ga yo are portentous, but some more than others.