Translation guide
How to express that something is working, in use, or ready for use in Japanese, depending on context.
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.
The air conditioner is operational.
Used for machinery, factories, or systems that are in operation. Slightly formal.
The factory is operational 24 hours a day.
Often seen on displays or indicators meaning 'in operation'. Not used in casual speech.
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.
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.
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'.
In operation (for machines)
このコピー機、使える？
Is this copier operational?
The elevator is currently operational.
We need to reduce operational costs.