Translation

不処罰 / 罰を受けないこと / 責任を問われないこと

Meaning

Impunity means freedom from punishment or serious consequences after doing something wrong. It is usually negative and often appears in the phrase with impunity. Do not use it for medical or legal protection in a neutral sense; that is immunity.

Examples

• その民兵組織は何年も罰を受けずに活動しました。
  The militia operated with impunity for years.
• 報告書は汚職の不処罰の文化を批判しました。
  The report criticized a culture of impunity around corruption.