I'm in China now and I have one in my hotel room.It is more than just Japanese immigration policy that we should adopt.
We should also control our retail markets like they do so as to promote domestic production. They don't do that with tariffs so how do they limit foreign products in their markets? Its something we should study lol.
They also are far advanced in toilets. First thing I did when I got home from Japan was to buy and install one of those Japanese toilets. They are amazing.
I think I enjoy it a bit too much.