Nathan is that you?
Well now that I have seen a couple of these homes I can actually estimate the price at ¥60,000,000 ( $550,000 ). Not including land cost.
It is a really great house, not one you actually see people buy these days but they do take ideas.
Bless Up!
No. It's Nathen; a random Nathen who just happened to really like your post, but not bad for 550K USD I'd say.