Tatemae (建前): the principle one officially stands by. The outward view. A dictionary gives the example Ano hito wa tatemae to honne ga mattaku chigau, that person’s public stance and true feelings are completely different.
Honne (本音): one’s true thoughts or feelings, as opposed to what one says in public for the sake of harmony.
Deru kui wa utareru (出る杭は打たれる): the stake that sticks out gets hammered. A person who stands out or oversteps tends to be resented and criticized by others.