You're taking the two places that have the most tourists and lowest residential concentration in Tokyo. Obviously it's going to be mostly tourists in the shop.
Go see a Donki in a residential neighborhood and it'll be full of locals. I live in Shirokane, an upscale highly residential neighborhood off of Meguro station, and even if it's reputed as one of the richest place in Tokyo there is a Donki and it's packed with local families shopping.
Go see a Donki in a residential neighborhood and it'll be full of locals. I live in Shirokane, an upscale highly residential neighborhood off of Meguro station, and even if it's reputed as one of the richest place in Tokyo there is a Donki and it's packed with local families shopping.