The culture of the customer is always right also implies making contortions to please them, including many on site meetings where you have to be there just as a sign of respect. It is interesting the first time you do it, but gets boring fast.
I believe Japan has so much untapped potential, the generalization of WFH may be the catalyst for Japanese management practices to catch up the last 60 years.
I've always wondered if there could be something like a badge you could put on your business, to signal that you're participating in a separate sub-economy where the customer isn't always right. There must be modern companies where both sides of the giving-face transaction are just going through the motions with neither side actually thinking that that's the way things should be. Can't both sides in a long-standing relationship just get together to agree to change the deal? Or, if they can't do it on their own, can't a third party help them?
Maybe there could be a Japanese charter-city with the goal of being a "mock Silicon Valley", i.e. where every business there knows that every other business else there is going to present itself with the attitude of a real SV startup where you "fire your bad customers" and so forth. So, when dealing with a company from there, everyone else would know that you don't have to give them any face, just like you don't need to give real Americans any face.
I've been reading some Japanese discussions boards about remote and it's a mixed big. A lot of people enjoy remote and say it's their first time not having to do OT anymore because of the lack of (assumed) peer pressure. Some new managers are now discovering that they can contact their employees at any time of day now due to services like Slack. Not that they couldn't before, it's just more efficient now.
Either the general feeling is 'I've seen things now that I cannot unsee' and the expectation is things will change but no one is sure in which direction.
The reason the tides are changing is that there is a social consciousness aspect to it now whereas before it would've been viewed differently.
Kind of reminds me of which countries have the fastest/cheapest Internet access now. The countries that had Internet first tend to have shitty copper infrastructure and expensive plans, while the newer countries are all up with the latest fibre infrastructure and fast/cheap plans.
So even if it will make you far more efficient there will be a temporary productivity slump as people get adjusted to it.