An unlawful act; conduct that violates the law. In civil law, it often refers to acts causing damage to others that give rise to liability (yojijukugo).
裁判所はその行為を不法行為と認定し、被告に賠償を命じた。
The court found the act to be unlawful and ordered the defendant to pay damages.
SNSでの中傷が不法行為に当たる場合もある。
Defamation on social media can sometimes constitute an unlawful act.
弁護士は、不法行為としての要件を丁寧に説明した。
The lawyer explained in detail the requirements for an act to be considered unlawful.