I don't normally give 5 Stars, but this place is really quiet a find in amongst the plethora of AYCE places here in Ontario - of which by nature are not able to offer the higher quality of an 'normal' restaurant.
To reiterate: this is NOT an AYCE place!
The food is very fresh and fast. The sushi (rice) is fresh, as are the ingredients and the various rolls and Sashimi are bursting with flavor. And they don't use tempura flakes as filler as is common up here.
I also had a Salmon laid on a bed of bed of vegetables. I ate it all it was that good.
This is a very nice sit-down restaurant with fast, efficient service which is at the perfect attention level. You won't have dishes piling up, or empty drink glasses, be neither will you have a hovering wait-person.
I'm summation: Masamune is well worth the trip, even if you must drive an hour or two. (I myself am an hour+ down in Waterloo) I'm coming back here absolutely.
Based on the quality of this place, it probably gets crowded, so you may want to call ahead.