Check everything is intact, no missing screws etc.
Try to see if the truss rod nut is sound and not burred up and ideally check to see that it functions.
Check for rattles, fret buzz, fret wear, high frets. etc.
Check control pots function etc.
Unless it has been seriously abused, I'm sure it will be fine, all the Japanese ones I've owned and played have been of a very good standard.