I can imagine how different the market was a few years ago, better prices and better preserved watches, of course, this "japannese" watches might been already sold, and as the demand is higher and higher lot of this vintage watches been sold in Japan may be from other countries, but as I wrote, to have all this different pieces with a similar quality in the same place is something really practical. next time in Tokyo I will contact you for sure it will be nice to meet other watch nerds specially in Tokyo.
cheers