Understanding Japanese History through Science Fiction

If you read a lot of science fiction novels, as I have, one vehicle you'll find writers using is the idea of a "great renaming" in which familiar place names are changed, usually to denote much time passing or a period of great upheaval. (For example, 5,000 years after the original Dune novel, the planet Arrakis becomes known as Rakis.) It sounds very cool and science-fictioney, and yet a "great renaming" is exactly what happened in Japan during the Meiji Reformation, when the old system of feudal domains (han) was retired in favor of a modern prefectural system with all new names. As a result, virtually every region of Japan has two names associated with it, its current one (for example, Gunma Prefecture, where J-List is based), and its old name (which is Joshu-no-kuni). The archaic names aren't official anymore, yet they're still used quite often, for example an udon restaurant might advertise "authentic Joshu noodles" to make customers associate their food with something old-fashioned and tasty. Sometimes the use of the archaic names seems to be custom-made to confuse foreigners living here. For example, the freeway that goes from Tokyo to Niigata is the Kan-etsu Freeway, which makes use of the kanji for the old name of Niigata (Echigo), something that almost no poor gaijin would be likely to know.