Japan dramatically relaxed the green card regulations a few years ago.
Now you could get the green card by investing in Japan with 1 year stay.
Japan is not selling the green card but the real estate investment (or any other type of business
by establishing your entity here) should work very well.
Again the government is not selling the green card but you can
intelligently leverage the real estate investment for the preferential treatment.
I am discussing more practical strategy to get prepared and apply for the green card.
There is even a fast track.
If you like Japan and want to contribute to my country in good ways, your investment should be
appreciated by the government.