Where is a good sushi place in Toronto?
It depends on your budget.
If you don't mind spending money, then you can try Hiro Sushi, Sushi Kaji, Omi, EDO, Katsura, just to name a few.
If you are more value minded, then you can look for previous discussions on restaurants with good all-you-can-eat sushi/sashimi.
I have a lot to say about the sushi in Toronto, since I'm actually from Vancouver. So I'm ultra picky.
The best sushi I've had so far, most authentic to Japanese is at Yamato in Yorkville. I've been to Hiro but it was quite horrible when I went, and frankly overpriced and overhyped. I don't think fresh sushi is their strong point.
Another small place that is authentic is in Bloor West Village... I think the place is called Sushi Inn... but it is less of a formal restaurant and more of a casual place. They are quite authentic. There is also Rikishi, which is on Bloor near Shaw. Slow service but fairly authentic.
Then you have your B grade places that are not run by Japanese... they are run by Chinese/Taiwanese. But the prices are more affordable (still, you get what you pay for). One of these that is better than some others is Sushi Supreme on Yonge, just north of Davisville.
I've also been to Nami on Adelaide St. which is in the financial district... but I liked Yamato's sushi better. Nami has a nicer atmosphere but you pay more for that, and the portions were ultra small but expensive. But nicely presented.
I'm not an expert, but I've been hugely satisfied with Sushiman (at Richmond and Victoria) for more than 10 years now. The many Japanese expats I've met at the suhi bar over the years all LOVE the place and that (plus my own taste and judgement) is recommendation enough for me. Curiously, Mr. Tani's place is never, ever reviewed. Beats me, for his unpretentious restaurant is superb. Note: Unless you're broke, skip the monthly "all-you-can-eat" extravaganza, which does not do the restaurant justice.
re: Denis Pelletier
I am in complete agreement regarding Sushiman. It is always a reliable and satisfying choice for sushi cravings. You won't find any trendy sushi roll inventions here, but their sushi is always fresh and well-portioned (not too heavy on the rice). I enjoy their complete meals which usually come with two appetizers, a full bento box and some ice cream. Service is always friendly and attentive. Tempura and teriyaki dinners are tasty and nicely cooked.