How to say "fraud" in Japanese

• 詐欺さぎJLPT N1approx.Common
  nounFraud in the strict sense: deliberate deception to swindle someone, typically out of money or property. Use this for fraud as a crime or a serious swindle.
  私の知しる限かぎり、彼かれはその詐欺さぎの企たくらみには関与かんよしていません。↗

  To my knowledge, he has not been involved in the fraud scheme.
• インチキCommon
  noun, na-adjectiveReally means cheating, trickery, or deception. It can translate 'fraud', but in the loose sense of underhanded trickery rather than fraud as a criminal offense; for that, 詐欺 is the word you want.
  彼女かのじょは例れいの金かねのインチキ証券しょうけん商法しょうほうに引ひっかかり持ち金もちがねのほとんどを失うしなってしまった。↗

  She was taken in by that fake gold certificate scandal and lost most of her money.
• 不正ふせいJLPT N3approx.Common
  na-adjective, no-adjectiveDenotes injustice, unfairness, or wrongdoing in general. As a rendering of 'fraud' it is only a loose fit, naming dishonest conduct as a whole; for fraud itself, 詐欺 is the word to reach for.
  不正ふせいには抗議こうぎせざるをえない。↗

  You must speak out against injustice.

Use 詐欺 for fraud as a crime — swindling someone out of money; 「インチキ」 for cheating or underhanded trickery; 不正 for injustice or wrongdoing generally, covering fraud only loosely.

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

• 詐欺さぎfraud
• いんちきcheating
• 不正ふせいinjustice
• いかさまfraud
• ぺてんfraud
• 詐害さがいfraud
• 詐欺罪さぎざいfraud
• 欺詐ぎさfraud
• 騙りかたりswindle
• 似非者えせものsham
• 瞞着まんちゃくdeception