Justification; the act of showing or arguing that an action or decision is legitimate or warranted (used as a noun or as a suru-verb).
会社側は人員整理を業績改善のためだと正当化した。
The company justified the layoffs by saying they were necessary to improve performance.
彼らの行為を正当化する明確な根拠は示されなかった。
No clear grounds were presented to justify their actions.
政策の正当化にはデータと透明性が欠かせない。
Justifying a policy requires data and transparency.