PS

I don't know where you're at, but if you're outside Japan, they people running the restaurant probably aren't Japanese (probably Vietnamese or Chinese).

If you're in Japan, if they can stop giggling about your "weird" question, they probably won't know the answer. If they don't know the answer, they WILL make something up.

Never ask the Japanese anything about gaikoku vs. Japan.

I know this is highly politically incorrect and I just don't care.