Hi again, What are the best places to shop in Japan, Tokyo? Which products?

I'm Tryphine. I'm a self-employed English/ESL based in London, UK. thinking of moving to Japan to start an education-focussed (possibly an English Language school or an after-school club) business in Japan. My son is a US Marine currently based in Japan and I visited him Okinawa Island recently and fell in love with Japan. I'd be interested in chatting with people with the same idea with the view of possibly collaborating. Thanks.

Is it worth getting USS express passes during September?

When does the bus stop running in Japan & when does the train stop running

Reply where, and how long you stayed in Japan for! (Also what your favourite part of your trip)