As an aside, the Wangan in its main stretch from Shinjuku across Yokohama bay is awesome.
As long as you know where the cameras are ( and in Japan they tell you - how amazing is that...none of this "camera in a wheelie bin" shit ) you are free to go as fast as your car can take you.
The other that springs to mind is the highway ring that surrounds greater Tokyo.
Ive had amazing times on these roads.
It really did feel like a game at times, in that the machine i was playing, was grip, pitch and yaw sensitive too, lol//.,/.
That and the small fact i could actually die.
I'm really starting to warm to the Fonz in many areas not least of all in the way I communicate to it and it to I, but it....well...it has ...drawbacks a Euro definitely does not have...