I think I may have mentioned that Hirano Aya is also doing voiceovers for an NHK educational show called "Kaitai Shin Show." It is a sort of medical show about various aspects of the human body, with also a bit of a game-show element. Some clips have turned up
on YouTube that give us another style of Hirano-voice altogether. That old-fashioned voiceover you hear is Hirano. Not that it's so hard to tell.