There is an interesting post at Boing Boing about the mystery driver of an English car in Germany. German speed cameras on the autobahns photograph the licence and the driver's side of the car but not the passenger side. As a result, the driver of the right-hand-drive British car does not show up in photos. S/he is apparently aware of this and has a Muppet in the passenger seat to be photographed.
My understanding of the traffic cameras in Korea is that they only shoot the Driver's (left-hand) side. Drivers of imported Japanese cars would be invisible to the cameras, so they should be able to ignore the cameras and drive any speed they like.
I don't want the roads in Korea to be any more dangerous but I especially wonder about speeding in Germany. I said 'autobahn' above, but I'm not sure they have speed limits. If cars are already going 200km/hr, I wouldn't want anyone abusing whatever laws are in effect.