All my cars are genuine km's, never clocked down by myself, or people that i deal with in Japan. You can see the full list of my cars, I have 95', 96' Model R33's with 90,000, 115000kms etc.
This car was bought with those km's and interior and engine is all spotless. I cannot say its 100% Genuine but I can only say what i know and can see.
You could be correct - it could be Bu!!sh!t, I guess it has to be inspected and seen by those interested. Its a very clean car, thats all i have to say : )