Japanese Car Auction Grades Explained: How to Read an Auction Sheet
If you've browsed Japanese import cars, you'll have seen listings described as "Grade 4.5" or "Grade 4, interior B". These come from Japan's remarkable auction inspection system — and once you understand it, buying a car unseen from the other side of the world becomes far less of a leap of faith. In fact, a Japanese auction sheet usually tells you more about a car than a UK forecourt ever would.
What is a Japanese auction sheet?
Every car entering a Japanese auction (USS, TAA, JU and over a hundred others) is inspected by the auction house's own independent inspectors — not the seller. The result is the auction sheet: a single-page condition report with an overall grade, interior/exterior grades, a damage diagram of the body, equipment list, mileage verification and the inspector's written notes. Because trade buyers bid sight-unseen based on this sheet, the system's accuracy is what the entire market runs on.
Overall auction grades
| Grade | Meaning |
|---|---|
| S / 6 | Brand new or nearly new, delivery mileage, flawless. |
| 5 | Exceptional — very low mileage, effectively as new. |
| 4.5 | Excellent condition with only the slightest signs of use. The sweet spot for premium imports. |
| 4 | Very good — light wear consistent with age and mileage, no significant defects. |
| 3.5 | Average — visible scratches or dents, may need some cosmetic attention. |
| 3 | Below average — noticeable wear, higher mileage or cosmetic issues. |
| 2 / 1 | Poor condition, heavy wear, corrosion or mechanical issues. |
| R / RA | Accident-repaired history. RA is minor repair; R varies from cosmetic to structural. |
| *** | Sold as-is / not running — strictly for specialists. |
Most quality importers focus on grade 4 and above. Grade 3.5 can represent honest value on older cars, and RA cars can be bargains — but only when the exact repair is understood.
Interior and exterior grades
Alongside the overall grade, inspectors score the interior (and at many auctions the exterior) from A to D:
- A — excellent, virtually as new.
- B — clean with minor wear.
- C — visible wear: marks, scuffs, possibly small burns or stains.
- D — poor, requiring repair or retrim.
A "4.5 A" car is genuinely exceptional; a "4 B" is a very tidy used car.
Decoding the damage map
The car diagram on the sheet marks every imperfection with a letter-number code. The letter is the type of defect, the number (1–3) is severity — 1 being minor:
| Symbol | Meaning |
|---|---|
| A1–A3 | Scratch (A1 barely visible, A3 significant) |
| U1–U3 | Dent |
| B1–B3 | Dent with scratch |
| W1–W3 | Paint or panel repair (W1 near-invisible, W3 obvious) |
| S1–S2 | Surface rust |
| C1–C2 | Corrosion |
| P | Paint faded or marked |
| X | Panel needs replacing |
| XX | Panel has been replaced |
| G | Stone chip in glass |
Context is everything: an A1 scratch on a ten-year-old car is trivia, while an XX on a structural panel changes the conversation entirely. The inspector's handwritten notes (in Japanese) often contain the most important details — service history stamps, smoker's car, aftermarket parts, or a note that mileage is verified.
Why this system protects UK buyers
The auction grade system exists because Japanese dealers buy tens of thousands of cars a week without seeing them. That same independence works for you: it means a UK buyer, with a properly translated sheet, knows a car's true condition before bidding — something no amount of glossy forecourt photography can match.
How Japan Car Imports uses auction grades
We hand-pick stock at grade 4 and above with strong interior scores, review the original auction sheet and inspector notes for every car, and share what we find. Browse our current stock in Japan, see what's already landed and registered in the UK, or ask us to source a specific car — we'll send you the auction sheet and our honest read of it before you spend a penny.
Frequently asked questions
What is a good grade at a Japanese car auction?
Grade 4 and above is generally considered excellent for a used car. Grade 4.5 cars are close to showroom condition, grade 5 and S are near-new. Grade 3.5 can still be a good buy for older or high-mileage cars if the auction sheet notes are understood properly.
What does grade R mean at Japanese auctions?
Grade R (or RA) means the car has had accident repairs at some point. The severity varies enormously — RA usually indicates minor repairs, while R can range from a replaced panel to significant structural work. R-grade cars can be genuine bargains but should only be bought with expert review of the auction sheet.
Can Japanese auction sheets be trusted?
Yes — auction house inspectors are independent of the seller and their reputations depend on accuracy. The auction sheet legally describes the car to trade buyers, so material faults are disclosed. That said, sheets are written in Japanese shorthand, which is why a proper translation and expert review matter.
What do the interior grades A, B, C and D mean?
Interior (and often exterior) condition is graded separately from the overall grade. A means excellent, close to new; B means clean with minor wear; C means noticeable wear, marks or burns; D means poor condition needing repair. A grade 4 car with interior A is a very tidy vehicle.
What do the symbols on the auction sheet damage map mean?
The car diagram uses letter-number codes: A is a scratch, U is a dent, W is repair or paintwork, S is rust, C is corrosion, X means a panel needs replacement and XX means a panel has been replaced. The number (1–3) indicates severity, with 1 the most minor.
Find your import with us
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