Translation guide
The English word 'automatic' can describe devices that operate by themselves, actions done without thinking, or processes that happen as a natural consequence. This guide covers natural Japanese expressions for each meaning.
Describing a machine or system that works without human intervention.
The most common and direct translation for 'automatic' when referring to machines, devices, or systems that operate on their own.
This door opens automatically.
Cars with automatic driving are increasing.
A loanword from English, often used in product names or technical contexts. Less common in everyday speech than 自動.
This camera has an automatic mode.
Means 'fully automatic', emphasizing that no manual operation is needed at all. Often used for appliances like washing machines.
I bought a fully automatic washing machine.
Describing an action that is performed unconsciously or as a reflex, without deliberate thought.
Literally 'unconsciously', this is the most natural way to express that an action is automatic in the sense of being done without awareness.
He has a habit of automatically touching his hair.
I answered automatically without thinking.
Means 'reflexively', emphasizing a quick, automatic reaction like a reflex. Suitable for physical or immediate responses.
Means 'naturally' or 'spontaneously'. Can be used when an action happens automatically as a natural result, without force.
Describing a result or outcome that follows inevitably from a situation or action.
The adverbial form of 自動, used for processes that happen automatically as a built-in consequence, such as in rules or systems.
When you register as a member, points are automatically awarded.
Updates are performed automatically.
Means 'as a natural consequence'. Used when an outcome is logically or inevitably automatic given the circumstances.
A conditional pattern meaning 'if... then automatically...'. Useful for explaining cause-and-effect automatic processes.
Referring to a weapon that continues firing while the trigger is pressed.
自動 (じどう) is the standard Japanese word for 'automatic' and is used in most everyday contexts. オートマチック is a loanword that appears in product names, technical specifications, or to give a modern feel, but it is less common in casual conversation. When in doubt, use 自動.
While 自動 is perfect for machines, using it to describe a person's automatic behavior (like breathing or habits) can sound unnatural. Instead, use 無意識に (unconsciously) or 反射的に (reflexively).
The ball came flying and my hand automatically went out.
With practice, your body will move automatically.
If you don't make an effort, failure is automatic.
If you press this button, the power will automatically turn off.
Also used in the context of firearms, often in technical or military jargon.
automatic pistol