Well, i don't have any experience with PKDM wagon r , but I can tell you about JDM ...I heard parts are very expensive , to give you an idea ...
each head light is 30,000 plus , bumper is 25,000 plus ...side mirror is 18,000 plus ..on the other hand now I have JDM wagon r since 2013 September , no mechanical job , good performance , smooth drive , great options , 18+ milage , I drove to naran and as well from attock to Mianwali and back non stop ?No heat issues , great ac . As per usage is concerned I would love to buy JDM , but parts dafinatly No