normally buying Japs used car body number 1, than engine & g.box.. cause most japs car can find engine and g.box. Korean car you need to make sure body, engine, and g.box good condition.
you got to look at the joint, weld, curve, boot, rear spare tires compartment, curve, paint, glue / rubber sealant, undercarriage, firewall weld on the structure (if front impact are serious, structure may go deeper into firewall) . try see few more identical car, you will know the difference.
don't look at the car on the outlook, outlook internal, under.