social norm
Refers to unwritten rules or standards of behavior shared by members of a society.
社会規範に従って行動する。
Act in accordance with social norms.
社会規範 refers broadly to social norms and expectations, while 公序良俗 specifically denotes the legal minimum standard of order and morality that contracts and acts must not violate.
Compound of 社会 (society) and 規範 (norm, standard).