Is F1 provided in HD in Japan with it being such a mature market for HD?
Don't know about the other races but FujiTV did broadcast last year's Japanese GP in HD, I believe it was 720p at 60fps. I also believe that since FujiTV are currently the host broadcaster for this year's Japanese GP they will also broadcast this year's race in HD.
Somebody posted this screenshot last year from the FujiTV HD feed:
And the same shot taken from the ITV SD feed:
From what i've seen on various forums the HD feed that FOM are providing for the Vue Cinema broadcast's are upscaled SD so I don't think there's an actual HD feed avaliable from FOM.