The threshold for getting consumption tax back has got to be way below Y100,000! I would say Y10,000 or there might not be any threshold -- but it isn't a big deal, you will only get back 5%!
I see the Crown Plaza is in Ikebukuro. There is a plan afoot to have a Thorn Tree (Lonely Planet board) gathering -- called for some obscure Australian reason, a "pissup" -- currently scheduled for Saturday night, May 28, meeting in Ikebukuro. FTers are also of course welcome, anyone interested?