Yes, all on a single ticket, issued directly by AC (hence, I assume all MCTs are being met).
There is a later flight direct from YYZ to NRT or HND (not sure which). Last time I checked, there was another YYZ-YYC flight that could allow me to take the YYC-NRT leg, but it was a tight connection at YYC. Didn't check YVR, though.
I agree, it would be helpful if someone who has done this kind of INT(non US)-DOM-INT connection can give us some insight.
Are immigration lines long at YYZ? The SCL-YYZ flight lands around 5am for what it's worth