Okay, my two cents and then I'm out.
First, if you don't live in Japan, why should this affect you?
Second, there's a difference between law and enforcement. Just because a law is on the books, it doesn't mean people will get in trouble for it. Where I live, it's apparently against the law to talk on your mobile while driving, but if you stood at the side of a busy road and counted how many people are doing it, you'd lose count.
I don't know if anyone here watches this guy, but he posted a video today with a comment that seems quite apropos:
Maybe people need to chill out for a second.
I have never quite got the "if you don't live in X" line of thought when discussing law. The only thing it is likely to do is make it more pertinent.
In this case Japan is still just about a major game manufacturing country, and if they stopped messing around they have one of the best IP catalogues of anywhere, certainly countries several times their size in most other arenas. Japanese hackers are fewer in number than some other places but I have met several, and Japan does fairly well for technical education/culture so I don't want to see further developments strangled (I don't know if you ever met the thing where Japanese people almost self/community police IP matters, fan art being a fun one there).
When talking about the US we tend to see them try to take the results on tour but Japan mostly spares us this one.
People routinely get ticketed for driving with a phone, it is considered an aggravating factor in cases and more besides. I would not make that analogy, not to mention it remains to be seen. A better thing might be to imagine what kind of parallels might be drawn -- in the UK it was technically illegal until fairly recently (and even then I am not sure what goes) to do format shifting, US law is also somewhat contentious here. Nobody got pinged for ripping their CD to an MP3 though.
Though in this case it is a new law, and Japan does feature a fairly serious measure of precedent, so it is up in the air. I am also wary as many times we have some seen obscure law come back to bite people in the arse, and then you face arguing foundational law to try to overturn it.
Going even beyond that am I am not allowed to feel for my fellow man (and their freedoms), judge a country's laws as far as wanting to do business/travel/live there or buy their products/take their investments?