English Translation
As far as I know, he has never been overseas.
Can gaikoku mean overseas?
Indirectly yes, but usually if you want to be precise it would be 海外（かいがい）instead, though they seem to be often used interchangeably in Japanese.
As far as I know, he has never been overseas.
Can gaikoku mean overseas?
Indirectly yes, but usually if you want to be precise it would be 海外（かいがい）instead, though they seem to be often used interchangeably in Japanese.