Translation guide
The English word "action" covers a wide range of meanings, from physical movement and legal proceedings to military combat and exciting events. This guide breaks down the most common uses for learners and provides natural Japanese equivalents.
Referring to doing something, a physical act, or movement.
General term for action, behavior, or conduct. Often used for taking action or describing someone's actions.
彼の行動は理解できない。
I can't understand his actions.
すぐに行動を起こす必要がある。
We need to take action immediately.
Refers to physical movement or motion, often in a mechanical or technical sense, or a single bodily movement.
このロボットの動作はとても滑らかだ。
This robot's movements are very smooth.
An act or deed, often with a nuance of intentionality or moral judgment.
それは犯罪行為です。
That is a criminal act.
Referring to taking legal proceedings against someone.
A lawsuit or legal action. Commonly used in formal contexts.
彼は会社に対して訴訟を起こした。
He filed a lawsuit against the company.
To take legal action. A common phrase meaning to pursue a matter through the legal system.
必要なら法的手段を取ります。
We will take legal action if necessary.
Referring to fighting in a war or battle.
Combat, battle. Used for actual fighting in a military context.
彼は戦闘で死亡した。
He was killed in action.
Referring to exciting things happening, often in entertainment or a lively setting.
Loanword from English, used for action movies, action scenes, or a sense of excitement and activity.
アクション映画が好きです。
I like action movies.
この街は夜になるとアクションがある。
This town has some action at night.
To get exciting or lively. Often used for parties, events, or situations becoming fun.
Referring to the way a machine or device operates.
Operation or activation of a machine. Often used in technical contexts.
エンジンの作動を確認してください。
Check the action of the engine.
Also used for mechanical operation, similar to physical movement but for devices.
Referring to the series of events that make up a story.
Plot or storyline. Refers to the sequence of events in a narrative.
この小説は筋が複雑だ。
This novel has a complex action.
Development or unfolding of events. Often used for how a story progresses.
When referring to a lively or exciting situation, directly translating 'action' as 行動 or 行為 sounds unnatural. Use アクション or describe the liveliness with words like 盛り上がる.
行動 is general behavior or taking action. 行為 is a specific deed, often with ethical weight. 動作 is physical movement, often mechanical or bodily. Choose based on whether you mean conduct, an act, or motion.
行動は言葉よりも雄弁だ。
Actions speak louder than words.
A direct translation of the proverb, though not a common Japanese saying.
Military action or operation. A broader term encompassing strategic moves.
政府は軍事行動を承認した。
The government approved military action.
パーティーは盛り上がった。
The party was full of action.
The action of this button is strange.
物語の展開が速い。
The action of the story moves quickly.