2 things. One he is a dumbass.
As the above person stated, why would a $70K+ vehicle be for 10K? Also how does he plan on getting it legal and such? Is it already registered and titled?
Also, There is no such thing as a JPN vin. JPN uses chassis codes. Give me the chassis code the guy is giving you and I can put it into the JPN Nissan Fast Software I have and tell you if it is a valid vin as well as production info about the vehicle.
-Sayajin