Do you know of shops that buys used item from a Non-Japanese resident, like from me for example I am a Tourist and I would like to sell my branded bags, watches when I get to Tokyo this month so I can have cash for my trip? Hoping for your immediate response.
Craigslist is very active in Japan for people who don’t speak Japanese.
If you do speak the language or have someone that can help you can also try mercari, jmty or frill.
Shops generally require a form of identification before accepting items from you, such as your residence card. If you don’t have one you’d better stick to online communities