Auction sheets vary from auction to auction but basically they contain the same infomration. Please check below the basic fields
VIN (Vehicle Identification Number) or Chassis Number
Age of the Japanese cars counted from its first registration in Japan so, manufacture date written on the Auction sheet doesn’t always mean actual date of manufacture.
Buyers whose countries put age restrictions on imported cars are highly recommended to check actual manufacture date (year and month) of the car prior to purchase.
There are numerous online websites offering VIN decoders and online VIN check services. Some of them are free and some others require payments.
You can always ask Japanese car Dealer to check actual manufacture date for any single car appeared on daily Japanese Car Auctions.