I do a bit of Japanese cooking and at first I found it difficult to find Japanese groceries in Toronto. Some things that I have looked for and found include: miso, nattou, umeboshi, wakame, aburage, japanese curry roux, pocky, etc. I have found a few places where they are available. Sanko Trading at 730 Queen Street West has a nice selection of Japanese groceries and I have been able to find almost everything that I have looked for there. Little Tokyo at 199 Augusta Ave. (in Kensington Market) also has a nice selection of Japanese groceries. There are also a few shops in the St. Lawrence Market at 95 Front Street East that have a limited selection of Japanese groceries.