Perhaps not many years ago, but they are certainly full of tourists now. Check out the Shibuya or Roppongi Donki on any given day, and the number of tourists is far greater than that of locals -- same with Daiso, recently.
Also my comment doesn't preclude Donki having some daily necessities. As for calling it a "staple" for central Tokyo, that's a bit of a stretch. If you said outside of the 23 wards, then I would agree.
Also my comment doesn't preclude Donki having some daily necessities. As for calling it a "staple" for central Tokyo, that's a bit of a stretch. If you said outside of the 23 wards, then I would agree.