I have been to the Yokohama HQ 2 yrs ago which is not quite as impressive. The Tokyo shop is new and was under construction when I lived in Tokyo.
They have some great stuff but extremely pricey. For example a e90 335i piggyback like the SSTT cost 95,000 JPY which is about USD1200. Yes its more than double. The Style 313 wheels with tyres cost 700,000 JPY which is USD 8000. yes also double...