Kanji for “justice”

Justice as moral righteousness, as fairness, or as classical duty — Japanese separates these.

正義 seigi

Closest natural translation · misunderstanding risk Low

Reading: seigi — Common compound reading
About the reading: The ordinary word for justice as a principle.
Literal meaning: Justice, righteousness
What it suggests: Doing what is right, and the cause of right against wrong. Used of heroes and of moral conviction alike.
When to use it: For justice in the everyday moral sense.
On its own: Natural as a complete noun.
In compounds: Natural in 正義感 (a sense of justice).
As a tattoo: Clear and strong. Slightly earnest — it is the word a hero would use.

公正 kōsei

Related meaning, not a literal translation · misunderstanding risk Low

Reading: kōsei — Common compound reading
About the reading: A standard word, common in official and legal language.
Literal meaning: Fairness, impartiality
What it suggests: Treating all sides evenly. Procedural rather than moral, and noticeably official in tone.
When to use it: For fairness rather than righteousness.
On its own: Natural, though it belongs to formal writing.
In compounds: Natural in 公正取引 (fair trade).
As a tattoo: Reads like a term from a contract; correct but cold.

義 gi

Symbolic choice, not a literal translation · misunderstanding risk Medium

Reading: gi — On-yomi; classical
About the reading: A real character with weight, though it is rarely a standalone noun in speech.
Literal meaning: Righteousness, duty, honour
What it suggests: One of the bushidō virtues — doing right because it is owed, not because it is convenient. Also means in-law, as in 義父 (father-in-law).
When to use it: For duty and honour in the classical sense.
On its own: Recognisable as an ideal, but not an everyday noun.
In compounds: Natural in 正義, 義務 (duty) and 忠義 (loyalty).
As a tattoo: Weighty and traditional. Its other everyday sense — in-law — is worth knowing about.
Worth knowing: The same character marks in-law relatives, which some readers will notice.

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