OK, here is something i got from website on Japanese grading system, will be helpful:
AUCTION GRADE ( Exterior )
As new condition, under 5,000km
Vehicle is like new. All original body parts. No repair needed on vehicle. Usually only given to vehicles less than 3 years old.
Vehicle is in excellent condition. No slight scratches or dents.
Vehicle in good condition, few scratches/dents due to normal wear as you would get with any normal vehicle.
Vehicle has a few scratches or dents visibly. The grade is usually given to a vehicle in average condition.
Various scratches or dents, some paint blemishes.
wholly badly corroded, non standard car, or modified car
inferior car, basically a pile of you know what. OR ... very heavily modified car.
RA or A1
Vehicle has been in a minor accident. It has been repaired to an acceptable standard.
R or A
A vehicle which has been in an accident where some parts have been repaired or replaced.
AUCTION GRADE (Interior )
As new condition. No faults.
Very clean condition poss. very slightly dirty.
Clean but with cigarette burn.
Dirty or stinky or big wear/rip on seats