i would ask you to take the MNC job (I am suspecting it would be hitachi). The chemical industry is pretty stable and you can use that to move to something else later. Police officer, on the hand, regardless of the high starting pay, counts as nothing in the real world. I suspect that you are not a scholar, so there is a glass ceiling for you. If you are content with younger scholars as your boss in the future, that is fine. Upside is limited as a police officer.