I have been wanting to try Ja Bistro for a while now and now have come here on two separate occasions - lunch and dinner. The menus are essentially the same, with the dinner adding 2-3 more items and fresh fish selection which is on the over-priced side ($9 for a single boston sourced uni sushi)... but you're paying for quality.
On the bistro menu, the must haves are the ika (calamari) and ebi nanban (shrimp). The ika is admittedly, probably the best calamari I have had.. and everyone has had a lot of calamari.
The menu shines on the blowtorched sushi portion. Every single roll is solid, but the standouts are the salmon and jabistrol (that also has uni in it). The jabistrol is probably my favourite and almost melts in your mouth. Best sushi in Toronto? possibly.
For dessert they had an interesting creme brulee+green tea ice cream that was different. They also have a very, very extensive sake list - ranging from reasonable to super pricey. It'll will be interesting how this place will hold up against the newer, much larger Vancouver import - Miku.
LATE EDIT: I ended up trying Miku in Vancouver. Ja Bistro's Aburi is far better.