Bro, the auction system in japan is a bit complex. Lemme give an example:
A car gets wrecked, and the airbags are deployed (making the car road illegal in Japan) and the insurance companies takes the car from the owner. The car is sold to an auction house where it is graded in the CURRENT condition. If it sells, great, if not, it is repaired and sold at another auction house and is GRADED in the CONDITION before it sold. So, a car may be an R grade at one auction and it may be repaired and graded a 4 at another option. If a person buys an R grade car, he can repair it in Japan or in Pakistan (cheap repairs). In conclusion, 99% of the cars from Japan are accidental.