Feels like commodore Perry's expedition force of this particular time line will be met with gun ships, seaplanes and submarines ... Not that I'm complaining though.
Nope. If you want (a little bit) more of that, there the fanfic alternative web novel called Nihonkoku Shoukan Kai. It's just as contrived as the original, with some of the base premises changed, and a bit of a different focus though.
Was the series abruptly dropped by the publisher just before what could have at least be a grand finale? If so either the authors of the manga adaptation must have screwed up real bad or it was doing so poorly that there was no point going on anyway ...