You're not being reasonable, but rather reading your own straw men into what I wrote.
Based on your misunderstandings, I can pretty confidently say that "rights" are a lot more complicated and multifaceted than you seem to comprehend. There are more kinds of rights relevant here than just property ownership rights and those created through contracts.
To put it another way: these Japanese regulations can be thought of as an articulation of preexisting rights that hadn't previously been codified.
I'm just going to ignore all the ridiculous hyperbole in the rest of your comment, because it's not worth a response. You seem enchanted by an over-simple toy mental model of society (with an admittedly seductive simplicity), and angry that it's not normative in a world that's too complex for it to fit.