I'm willing to stake a bet on the resistance of the public who they tangle with.
Most people won't challenge, as the legal fees would exceed what they owe to NHK. I'd bank that most won't even go to court, and will pay on receipt of the threat of legal action.
And more importantly, any decent attorney will advise people not to appeal - unless, of course, they can find another avenue to work, as this one's been definitively shut down.
They would need at least some kind of proof that you actually own a TV or another device to receive the transmission.
This is true - but in a lot of cases, all it takes is one of their collection people spotting the antenna on the roof of a house. I've been told - but this is purely anecdotal AFAIK - that they also routinely request and receive product registration records from TV and navigation equipment manufacturers. If this is true, there may be a class action case there somewhere for privacy law violations.
And as they can go back only 5 years worth of payments this will come to just 60 to 120 thousands per household.
Fair enough, I was just going off the numbers in the story posted - it seems that was for the 5 years previous to the suit being filed, and additional outstanding charges that accumulated during the legal actions and multiple appeals.
But still, even at 60K per head, if we use the lowest figure, you're still looking at roughly 9 million yen a month after filing fees. Makes lawyers a profit center. And I'm still in the wrong business.