Translation guide
The English word "instrument" covers a wide range of meanings, from musical tools to scientific devices and even abstract means. This guide breaks down the most useful Japanese equivalents for English-speaking learners, organized by practical meaning.
A device created or adapted to make musical sounds.
The standard word for any musical instrument. Use this in almost all contexts.
He can play three instruments.
What instrument do you play?
A tool or implement, especially for delicate or scientific work.
General term for instruments, apparatus, or utensils. Often used for medical, laboratory, or measuring devices.
Something used to achieve a result; an agency or medium.
The most common word for 'means' or 'instrument' in an abstract sense. Used for methods, ways, or tools to accomplish something.
A formal legal document, such as a contract, deed, or will.
A written instrument that serves as evidence of a legal act, like a deed or bond.
A person used by another to accomplish a purpose, often unwillingly or unknowingly.
These three words all translate to 'instrument' but have distinct nuances. 器具 (きぐ) is the broadest, covering tools, utensils, and apparatus. 器械 (きかい) implies a mechanical or precision device, often with moving parts. 計器 (けいき) is specifically a measuring instrument or gauge. Use 器具 for general medical or lab instruments, 器械 for machines, and 計器 for meters and indicators.
The loanword インストゥルメント is rarely used in Japanese and sounds unnatural. Stick to the native Japanese words above.
The violin is a difficult instrument to master.
この実験には特殊な器具が必要だ。
This experiment requires special instruments.
The dentist sterilized the instruments.
Often refers to mechanical or precision instruments, machines, or apparatus. Slightly more technical than 器具.
This instrument measures blood pressure.
Specifically a measuring instrument or gauge, like a meter or indicator.
The pilot checked the instruments.
Language is an instrument of communication.
He uses any instrument to achieve his goals.
Literally 'tool', but can be used metaphorically for an instrument or means, often with a slightly concrete nuance.
He is merely an instrument.
He signed the mortgage instrument.
General word for document; can be used for legal instruments in context.
To draw up a legal instrument.
Refers to a person used as a tool or pawn, often in a negative sense.
He was an instrument of the enemy.
As above, can be used for a person treated as a mere tool.
She used him as an instrument of her ambition.
The surgeon's instruments were sterilized.
Education is an instrument of social change.