There are high quality Chinese/Korean owned and operated Japanese restaurants. For example, Ichibankan Express on Broadway is run by Chinese people and they make very good sushi at reasonable prices. The toppings are always very fresh and high quality. In my opinion, the worst ones are run by the Vietnamese. I just find Japanese owned and operated restaurants rather overpriced. A good point is Sushi House - I like their rice but the stuff inside the sushi does not justify the price you have to pay. Less quality and quantity than Ichibankan Express and it's slightly more expensive. Sushi House stuff is still very good, but it's no where near excellent. I truly believe you can have quantity, but it must have quality too. If you want truly authentic Japanese cuisine, you can always go to the restaurant at Nikkei Heritage Centre in Burnaby - they don't serve California rolls or other Westernized Japanese stuff.