Translation guide
Describes something that is currently functioning, active, or in effect. The most common Japanese equivalents depend on whether you are talking about machines, systems, rules, or businesses.
The machine is in operation.
The new system is in operation.
To say that a machine, device, or piece of equipment is currently running or functioning.
The most natural way to say a machine is 'in operation' or 'running'. Literally 'is moving'.
The air conditioner is in operation.
A more formal or technical term, often seen on signs or in manuals. Means 'in operation' or 'active'.
The machine is currently in operation.
Used for machinery or systems that are 'in operation' or 'in service', often in industrial or business contexts.
The factory line is in operation 24 hours a day.
To say that a system, plan, law, or service is currently active or being implemented.
Commonly used for plans, policies, or measures that are 'in operation' or 'being carried out'.
The new system is in operation.
Used for systems, networks, or services that are 'in operation' or 'in service', emphasizing ongoing management.
The new database is already in operation.
Specifically for laws or regulations that are 'in effect' or 'in operation'.
That law is still in operation.
To say that a company, store, or organization is currently operating or doing business.
The English phrase 'in operation' does not have a single direct equivalent in Japanese. Using a literal translation like 「操作中で」 is unnatural. Choose the appropriate term based on what is operating.