Translation guide
The English phrase 'foul play' has two main uses: (1) unfair or dishonest behavior, especially in sports or games, and (2) criminal violence or suspicious activity, often leading to death. This guide covers natural Japanese expressions for each meaning.
Expressing that someone acted unfairly, broke the rules, or cheated in a game or competition.
The most direct and common term for a foul or rule violation in sports and games. It can be used as a noun or with する to mean 'commit a foul'.
Indicating that a crime involving violence may have occurred, especially when a death is suspicious.
The English phrase 'foul play' does not have a single direct Japanese equivalent. Using ファウルプレー is understood in sports contexts but sounds like English loanword usage. For criminal contexts, always use the phrases above.
反則 is for rule violations in games/sports. 不正 is for dishonest acts like cheating or fraud. 事件性 is specifically for suspected criminal activity, often in mysterious deaths.
あのプレーは明らかな反則だ。
That play was clearly foul play.
彼は反則を犯して退場になった。
He committed a foul and was sent off.
Means 'dishonesty' or 'unfairness'. Broader than 反則, covering cheating, fraud, or corrupt practices in games, exams, or business.
選挙で不正があったと疑われている。
There is suspicion of foul play in the election.
彼は試験で不正を働いた。
He cheated on the exam.
Casual term for cheating or unfair trickery, often used by children or in everyday situations. Can be used as a noun or with する.
ずるはだめだよ。
No foul play! (No cheating!)
彼はいつもずるをして勝とうとする。
He always tries to win by cheating.
Literally 'dirty play', used for unsportsmanlike conduct that may not be an official foul but is considered unfair or unethical.
あの選手は汚いプレーが多い。
That player often resorts to foul play.
Used in phrases like 事件性がある (there is suspicion of a crime) or 事件性はない (no foul play suspected). Common in news and police contexts.
警察は事件性があるとみて捜査している。
The police are investigating on the suspicion of foul play.
遺体に事件性は認められなかった。
No signs of foul play were found on the body.
Literally 'suspicion of a crime'. Used when foul play is suspected but not confirmed.
彼の死には犯罪の疑いがある。
His death is suspected to involve foul play.
Means 'homicide' or 'murder' as opposed to natural death or suicide. Used in official or news contexts when foul play is confirmed.
死因は他殺と断定された。
The cause of death was determined to be foul play (homicide).