In the US and Europe having your own, dedicated place to put your car is probably more or less weakly coordinated with owning a car (maybe less in the US, where at least in some places owning a car is more of a requirement?). Just because being able to afford a car is probably weakly coordinated with being able to afford your own spot. But this regulation should make that even more so in Japan.
Every Nissan dealership has a charger, and I've never seen any queue for it, but it's almost always occupied.
For some commenters the article (or its headline) serves the sole purpose of self-adulation: Keeping your bias working. Adding 'stats' to back your argument. Something to numb other peoples criticism in a discussion.
In that sense, any subleties of Japanese culture would actually hurt.
edit: There's a culture difference with regards to driving that I explained in another comment just now. Reading some of the other comments further down makes me think that very few people commenting here understand the laws and culture behind driving in Japan.