I don't have a lot to add to what other Yelpers have already reviewed. Clean, nice service, and quality items.
Sakana-ya has a cooking / grilling stall outdoor in warmer months, you can buy the seafood from them and have it prepared right there. Grilled uni and scallops in shells are sublime. You can also get Oden skews from the same stall, not bad.
Nakamura is where you get authentic Japanese-French style stuff. Imitation cheaper versions are plentiful in many Hong Kong or Taiwanese bakeries in GTA, for the REAL thing, come to Nakamura.