Translation guide
The English word "killer" can refer to a person who kills, a murderer, a hired assassin, or something that causes death. It is also used informally to describe something extremely difficult, impressive, or excellent. This guide covers the main meanings and their natural Japanese equivalents.
Referring to someone who has killed a person, especially in a criminal context.
Standard term for a murderer or someone who has committed murder. Used in news and legal contexts.
The police arrested the killer.
A more direct and somewhat blunt term for a killer or murderer. Can sound harsh or emotional.
He is a killer.
Formal term for a killer, often used in legal or official documents. Less common in everyday speech.
The killer fled the scene.
Referring to a person who kills for money or as a profession.
Common term for a hitman or professional killer, often used in fiction and crime contexts.
He is being targeted by a killer.
Assassin, especially one who kills a prominent person. Often used in historical or political contexts.
Loanword from English, used specifically for a hired killer, often in organized crime.
Referring to a disease, animal, object, or substance that kills.
Adjective meaning lethal or deadly. Used for diseases, poisons, etc.
This is a killer poison.
Literally 'to take a life', used to describe something that kills.
The disease was a killer.
Loanword used in compounds like 'シリアルキラー' (serial killer) or 'キラーウイルス' (killer virus). Not used alone for this meaning.
Describing a task, situation, or experience that is very hard to endure.
Adjective meaning tough, demanding, or exhausting. Commonly used for work, schedules, or physical strain.
Work today was a killer.
Literally 'tough enough to die', a hyperbolic way to say something is a killer.
This homework is a killer.
Adjective meaning murderous or brutal, used for schedules, heat, etc. Somewhat dramatic.
It's a killer schedule.
Informal use to describe something very good, cool, or amazing.
General word for amazing or great. Can be used in many contexts.
That guitar solo was killer!
Means 'the best' or 'awesome'. Fits well for things like performances or food.
Slang term that can mean both 'dangerous' and 'amazing'. Context-dependent.
When using 'killer' as slang for 'excellent', do not directly translate it as 殺し屋 or 殺人犯. Use natural Japanese intensifiers like すごい or 最高 instead.
That movie was killer!
殺人犯 is the standard legal/media term for a murderer. 人殺し is more direct and emotional, often used in accusations. 殺し屋 specifically means a professional hitman. Choose based on context.
The killer was sentenced to life in prison.
That hike was a real killer.
She has a killer smile.
The president was shot by a killer.
彼はマフィアのヒットマンだ。
He is a mafia killer.
キラーウイルスが流行している。
A killer virus is spreading.
このラーメン、最高！
This ramen is killer!
この曲ヤバくない？
Isn't this song killer?