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.
機械が動いています。
The machine is in operation.
新しいシステムが実施中です。
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'.
エアコンが動いている。
The air conditioner is in operation.
A more formal or technical term, often seen on signs or in manuals. Means 'in operation' or 'active'.
機械は現在作動中です。
The machine is currently in operation.
Used for machinery or systems that are 'in operation' or 'in service', often in industrial or business contexts.
工場のラインは24時間稼働中だ。
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'.
新しい制度が実施中です。
The new system is in operation.
Used for systems, networks, or services that are 'in operation' or 'in service', emphasizing ongoing management.
新しいデータベースはすでに運用中です。
The new database is already in operation.
Specifically for laws or regulations that are 'in effect' or 'in operation'.
その法律はまだ施行中です。
That law is still in operation.
To say that a company, store, or organization is currently operating or doing business.
The standard term for a business being 'open' or 'in operation'. Often seen on signs.
その店はまだ営業中ですか？
Is that store still in operation?
Used for factories, plants, or large-scale operations that are 'in operation'.
その工場は現在操業中です。
The factory is currently in operation.
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.