How to say "justice" in Japanese

Choosing the right word
  • 正義せいぎJLPT N1approx.Common
    nounJustice as a moral ideal: the abstract principle of what is right and wrong. This is the word you want when English 'justice' means moral rightness or righteousness.
    最後さいごには正義せいぎは勝かつものだ。↗
    Justice will prevail in the end.
  • 公正こうせいJLPT N2approx.Common
    noun, na-adjectiveJustice as fairness and impartiality: unbiased judgment and even-handed treatment of people. Use it when English 'justice' means fair decisions and fair process, as in a court of law.
    王おうは自分じぶんの王国おうこくを公正こうせいに治おさめた。↗
    The king ruled his kingdom justly.
  • 公平こうへいJLPT N3approx.Common
    noun, na-adjectiveFairness as even-handedness: treating everyone alike, without favouritism or bias. Very close to 公正 and often interchangeable with it; its link to 'justice' is this fair-treatment sense.
  • 義ぎCommon
    no-adjectiveMorality, righteousness and honour rather than everyday 'justice'. As a standalone word it is seldom what you want for 'justice'; use 正義 instead.
  • 大義たいぎCommon
    nounA great cause or moral principle — 'justice' as something people fight or act for, not fairness in everyday dealings. Use it for the lofty justice of a cause, not for ordinary right and wrong.

Use 正義 for justice as a moral ideal, 公正 or 公平 for justice as fair, impartial treatment, and 大義 for the lofty justice of a great cause; 義 alone is seldom the word for 'justice'.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese equivalents
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JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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