Translation guide
How to express that something is working, in use, or ready for use in Japanese, depending on context.
システムは正常に動いています。
The system is operational.
Describing a machine, system, or device that is currently working or able to be used.
Literally 'moving normally', this is a natural way to say something is operational/functioning.
エアコンは正常に動いています。
The air conditioner is operational.
Used for machinery, factories, or systems that are in operation. Slightly formal.
工場は24時間稼働している。
The factory is operational 24 hours a day.
Often seen on displays or indicators meaning 'in operation'. Not used in casual speech.
システムは作動中です。
The system is operational.
Indicating that a service, facility, or piece of equipment is available and can be used.
Commonly used for services, websites, or facilities that are available for use.
このサービスは24時間利用可能です。
This service is operational 24 hours a day.
Casual way to say something is usable/operational. Very common in daily conversation.
Similar to 利用可能 but more about physical usability. Often seen in manuals.
Referring to military operations, operational security, or organizational activities.
Directly translates to 'operational' in a military or strategic context.
作戦上の理由で詳細は言えません。
I can't give details for operational reasons.
Used for operational matters in business or systems, e.g., operational costs.
運用上のコストを削減する必要がある。
We need to reduce operational costs.
The English word 'operational' covers many meanings. Do not use a single Japanese word for all cases. Choose based on whether you mean 'functioning', 'available', or 'military/strategic'.
稼働中
In operation (for machines)
このコピー機、使える？
Is this copier operational?
エレベーターは現在使用可能です。
The elevator is currently operational.