I guess Hikuro isn't aware that Infinitis are badged as Nissans in Japan..... Although I do hear that they're supposedly going to start using the Inifiniti name sometime in the very near future.
As far as Nissan goes in the US, if it bears the Nissan name (except the 350ZX), the car is a North American model these days and was made either in the US or Mexico. If you want a model that's sold in both the US and Japan, buy an Infiniti.
Of course, if I'm wrong, please by all means correct me