I'm going to jump in here and burst this romantic bubble view of Japan.
Japan is not more advanced than any other developed country. There are a few areas where they have led and a few of those where they still lead, but on the whole, it is just another prosperous (debt-ridden), developed country.
It isn't the 90s and early 00s anymore and hasn't been for over a decade. Yet Japan still rides off its past reputation.
u picked the wrong post upon which to found your clearly long-since-formulated statements...
i live here, and i came here at short notice to live with my wife whom i had met in my home country, not because i'm a weeb... before i came here i never even considered living here because I thought it was an overly expensive country with big social problems (i was and remain in love with Beijing, ironically, where i lived from ages 15-20, though i don't plan to go there anymore) that's where my interpretation of this place comes from.
Nothing I mentioned in the post you quoted had anything to do with the bubble economy, or excesses of that period. I was exclusively listing off traditional, medieval things that came to a more advanced state because the Japanese 'medieval period' - while not clear cut or homogenous - extended far further towards the modern day than the European one. Basically, I hold up miso, natto, mochi, and a dozen other 'high tech' traditional foods (as I've interpreted them - having lived for a total of 20 years of my life in brussles, berlin, beijing, nagoya and now tokyo,, in addition to 10 or so in my home country of australia - against the traditional foods of other cultures) as examples of highly refined medieval technologies that only exist because they, as food technologies - were allowed to ferment - if you'll pardon the pun on foment - for so much longer.
So, yes, my point was that if the romans had also existed until the meiji restoration then, yes, perhaps italy would currently be providing us with their own take on miso, or some hyper advanced plumbing and public bathing system which had helped Europe fight off the black death with greater success - just spitballin' here.
NOTE: funnily enough they say that the Mediterranean diet is the closest the west has come to the japanese diet, i hear, so who knows what might have been with that added time for development