Places to find cheap lenses in Tokyo?

Hey all, I’m in Japan on a trip and have already had a few days in Tokyo. I went for a walk through the West Shinjuku camera shops and saw tons of stuff but wasn’t quite sure what I was after. Now I think I’m looking for a Canon EF 40mm pancake lens (this might matter). Does anyone have any tips for a good place in Tokyo to look for a deal on this is? Used or otherwise. via /r/photography https://ift.tt/2HoLEFx