The supermarket part of the mall was very underwhelming and disappointing for me, considering the fact that I had been wanting to visit J-Town for a long long time.
The market was very cramped; yes they have a lot of items from Japan but I could get some of the items from other Asian supermarket in GTA. They seem to serve good Japanese food but we have a few great ones as well. So I guess the point of J-Town is to create a pseudo-Japanese shopping experience. But unfortunately, to me, the vibe seems to be very weak. It is not even as good as Pacific Mall.
There is a pedestrian street between the building facing Steeles, which has a few stores/restos, and the building with supermarket I described. There is a few benches and a Japanese style bamboo fountain on the street. It is interesting, but not quite architecturally nice to look at, in my opinion.
There is ample parking spots at the back which is a plus.
There are comments on the expired food. I did not see any but I hope they stop doing that if that's true.