Translation guide
A person who commits a series of murders, often with a pattern. In Japanese, the term is usually expressed as a compound noun or phrase. The most common and direct equivalent is 連続殺人犯, but other terms exist depending on context.
Referring to a person who has committed multiple murders over time, often with a psychological motive.
Standard term for 'serial killer' in news and everyday conversation. Literally 'continuous murder criminal'.
The serial killer was finally arrested.
Loanword from English, commonly used in media and pop culture. Slightly more casual or sensational.
He is a famous serial killer in Japan.
Less common variant; 者 (しゃ) is a more formal suffix for 'person'. Used in legal or academic contexts.
A psychological analysis of the serial killer was conducted.
Referring to the concept or the series of murders itself, rather than the person.
連続殺人犯 is the standard, neutral term. シリアルキラー is a loanword often used in entertainment or informal contexts, but it's widely understood. In formal writing or news, stick to 連続殺人犯.
Specifically 'serial murder case'. Common in news reports.
The police are continuing the investigation of the serial murder case.