Tokyo/Osaka thrifting recommendations

Hi guys

I've Heard that the thrifting and vintage selection in Japan is fantastic, but has been subjected to quite a bit of "tourist tax" in the last few years. That being said, could anyone recommend some stores across Tokyo or Osaka where the selection is nice and the prices are fair? Additionally, are places like shinjuku, shibuya, harajuku in Tokyo and umeda, namba in Osaka worth exploring for thrifting ?

TIA

by mecawesumville