Translation guide
This entry covers how to express the idea of not realizing that a situation is changing, often with a nuance of being oblivious or failing to notice gradual shifts.
Expressing that someone does not realize a situation is currently changing or has changed.
A direct and natural way to say 'not noticing the change'. Suitable for most contexts.
彼は状況の変化に気づいていない。
He is unaware that the situation is changing.
Emphasizes the ongoing nature of the change. 'Not noticing that it is changing.'
周りが変わっていることに気づかない人もいる。
Some people don't notice that things around them are changing.
A noun/na-adjective meaning 'unaware' or 'unconscious'. Often used in formal or psychological contexts.
彼は自分の変化に無自覚だ。
He is unaware of his own changes.
Conveying that someone fails to perceive slow, incremental changes over time.
Explicitly mentions gradual change. Natural for describing slow shifts.
街が徐々に変わっているのに気づかなかった。
I didn't notice that the town was gradually changing.
Means 'it has changed before one knows it'. Focuses on the result of unnoticed change.
いつの間にか周りの環境が変わっている。
The surrounding environment has changed without me noticing.
Used when someone doesn't catch on to changing social norms, fashions, or opinions.
Literally 'not noticing the flow/trend'. Common for social or market trends.
彼は時代の流れに気づかない。
He doesn't notice the trend of the times.
More formal, 'unable to detect changes'. Suitable for business or analytical contexts.
市場の変化を察知できない企業は生き残れない。
Companies that cannot detect market changes won't survive.
While 気づいていない is the most direct equivalent, using 無自覚 or 無意識 can sound overly clinical or psychological. Stick to 気づかない for everyday speech.