Thanks for all the responses. I will be staying at Hilton Tokyo in Shinjuku, so will certainly check out Yodobashi.

halcyongolf, thanks for the tip on Fujiya camera. I am in the market for a couple of lenses and (hopefully) a speedlight (SB800). I know how much these items cost here in the US and will see if I can get them any cheaper at Fujiya...I don't mind used lenses, but will speedlights have to be new...!

Thanks again.