island nation spirit
the idea that citizens of island countries like Japan tend to be narrow-minded and exclusive towards “outsiders”, e.g. people who are from foreign countries; who do not follow social norms; or who seem to enjoy privileged opportunities
This term is often used when one criticises Japanese people for being exclusive towards those who do not follow social norms.
“The proverb ‘the nail that sticks out gets hammered down’ represents the exclusive mindset of Japanese people”, he said.