@lewm I think it depends on the store, since they have several, but the one I visited had a strong game with HiFi and prices were 50% lower than US, obviously mostly Japanese brands for example Luxman, which I don’t think its for kids since prices can go up to 20K here.
@sammyshaps there are a couple of stores on Akihabara neighborhood that also have a strong game on HiFi, Dynamic Audio is one of them, watch out because they have 7 floors if they do not have what you are looking for they can guide you
That was my experience in Japan in July 20023, I was able to buy some of the best cables at 50% less price than USA but you have to look for things