I will echo the other reviewers - wow.
Sushi Kaji is certainly not your everyday sushi place at the $80 - $120 per person price-point, and I got treated here for a recent birthday. I had been wanting to try it ever since my Japanese co-worker told me this is the best Japanese restaurant in Toronto - a recommendation I put a lot of stock in.
What I didn't expect is the inventive-ness of the menu - it really was a great tasting menu. I think I still enjoyed the sashimi the most - the raw tiger shrimp with cream sauce was AMAZING! But I didn't expect everything else - the cream coffee mousse, the abalone - I could go on and on but as another reviewer mentioned, the menu changes frequently so there's really no point. Just go with an open mind and enjoy!
As a frame of reference, I would rank it up there with Morimoto in NYC - the only other restaurant that I would say would come close. I guess the main difference is the decor - this one is unassuming - I found it hardly different from a sushi restaurant that servers $10 bento boxes, while Morimoto looks and feels expensive. The service was neutral - decent but not outstanding. But in all, a great choice when celebrating a special occasion for a very memorable meal!