We have two issues: 1. Home charging difficulty and 2. Car width. Re public charging we have nationwide CHAdeMO network (almost 2000 units) so it's one of the best - Tesla will also roll out Superchargers in Japan.
Other L2 chargers are slow - 20A 200V is only 4kW.
In Japan we have approx 10% of population live in Metropolitan-like areas where apartments and condos are common. I live in a condo too. However rest have regular homes and they will have charging at home.
Bigger problem is that MS is too wide to fit in the mechanical parkings, which are very common in Japan. Even in rural areas mechanical parkings are used to save space. As MS is wider than Merc S class, and with 21 inch much wider, I think MS will not fit many of the office parkings in the central area of Tokyo.
I personally can't charge at home but I changed my office parking from mechanical to flat underground parking, where the building owner allowed me to setup HPWC at my expense (a little over 10K USD). You may want to search for those owners with support for EVs.
I plan to work with my condo HOA to have a small CHAdeMO in the public area. In Tokyo many apartments have 6.6kV line coming to the building so it usually have enough capacity to have 50kW. Of course the apartment should have enough capacity voltage converter cubicle as CHAdeMO chargers require 200V 3-phase input.