Translation guide
How to express 'become aware of' in Japanese, covering noticing, realizing, sensing, and learning of something.
I became aware of the problem.
She became aware of his feelings.
To become aware of a fact, situation, or something previously unnoticed.
The most common and versatile way to say 'notice' or 'realize'. Used for both physical noticing and mental realization.
I became aware that he was lying.
Synonymous with 気づく, but slightly more formal or emphatic. Often used in written language.
To realize a deeper truth or become enlightened about something. Often used for profound realizations.
To become aware of something through the senses or a feeling.
To become aware of information or news, often through being told or discovering it.
To come to know or learn of something. Often used in the form 知った (found out).
To notice a specific sensory input like a noise or movement.
Again, 気づく is the default for noticing any sensory input.
気づく implies noticing something through your own senses or intuition, often something not explicitly told. 知る implies gaining knowledge, often through being informed or discovering facts. Use 気づく for realizations and sensory awareness; use 知る for learning information.
I noticed he was angry (from his expression).
When I entered the room, I became aware that someone was there.
She became aware of her mistake.
He became aware of the meaning of life.
To feel or sense something, often used for physical sensations or intuitive awareness.
I became aware that someone was watching me.
I became aware of danger and left the place.
To sense or infer something from subtle cues, often used for reading a situation or someone's feelings.
From her expression, I became aware that something had happened.
そのニュースを知って驚いた。
I was surprised when I became aware of the news.
I became aware yesterday that he got married.
Literally 'to hear', used when you become aware of something by hearing it, often casually or incidentally.
Have you ever become aware of that rumor?
To recognize or acknowledge something formally. Often used in technical or official contexts.
We need to become aware of the importance of the problem.
I became aware of footsteps approaching from behind.
To catch sight of something; to become visually aware of something.
I became aware of something moving outside the window.
彼が怒っていることを知った。
I found out he was angry (someone told me).
Avoid directly translating 'become aware of' as 意識するようになる or similar. While grammatically possible, it sounds unnatural. Use the verbs and phrases listed above instead.