noun, na-adjective
fair and impartial; just and unselfish
Describes a person, attitude, or decision that is fair, unbiased, and free from personal interest. Often used in formal or ethical contexts.
裁判官は公正無私な判断を下した。
The judge made a fair and impartial decision.
リーダーには公正無私の精神が求められる。
A leader is expected to have a spirit of fairness and unselfishness.
公平 means 'fair' or 'equitable' and is more common in everyday contexts. 公正無私 adds the nuance of being free from selfish motives, making it more emphatic and formal.
公正 means 'fairness' or 'justice' and is a simpler, more frequently used term. 公正無私 explicitly includes the idea of unselfishness (無私).
A yojijukugo (four-character idiom) composed of 公正 (fairness, justice) and 無私 (unselfishness, impartiality). The exact historical origin is uncertain, but it follows a common pattern of combining two two-character compounds to express an ideal of ethical conduct.