Red Spy on Rising Sun

Japan is famously know as the land of rising sun as it hidden unforseen force protected and serve Japan from shadow to daylight from future threat, you been send to Japan as transfer-student but a secret Vietnamese spy to help Japan against People's Republic of China spies and it influences, made peace with Russia - S. Korea & open a clean path in order to transport western weapon from pacific to Vietnam safe....but you found yourself a dumbfounded twisted complicated affair