A change of emperor on Wednesday marked a changed of era. It was goodbye Heisei and hello Reiwa, which will result in calendar and document changes, but in regards day-to-day life, not much else.
Also, such era changes are positively glacial when compared to the urban and societal shifts that Tokyo, and Japan in general, are experiencing. Pressing, and for some perplexing changes that will continue apace long after the pomp and circumstance of the last few days has passed.