Translation guide
How to express 'go astray' in Japanese, covering physical straying, moral/behavioral straying, and idiomatic uses.
To become lost or wander off the intended path.
The most common and natural way to say 'get lost' or 'lose one's way'.
山で道に迷ってしまった。
I went astray in the mountains.
Specifically means 'to become a lost child', but can be used for adults in a slightly childish or humorous way.
デパートで迷子になった。
I went astray in the department store.
To wander or roam without a clear destination, often with a nuance of being lost or aimless. More literary.
彼は暗い森の中を彷徨った。
He went astray in the dark forest.
To deviate from the right path in terms of morals, behavior, or life choices.
Literally 'to step off the path', a common metaphor for straying from the right moral or social path.
彼は若い頃、道を踏み外してしまった。
He went astray when he was young.
To run down the path of evil; implies actively choosing a bad path.
彼は悪の道に走ってしまった。
He went astray and turned to crime.
To become depraved or corrupt; a stronger term for moral decay.
権力者が堕落するのはよくあることだ。
It is common for those in power to go astray morally.
For an item, letter, or communication to fail to reach its destination or become lost.
To become missing or unaccounted for; used for people or objects.
手紙が行方不明になった。
The letter went astray.
Simply means 'not delivered' or 'does not arrive', often used for mail or messages.
メールが届かなかったみたいだ。
It seems my email went astray.
To deviate from the intended subject or plan.
Literally 'derail', used for going off-topic or straying from a plan.
話が脱線してしまった。
The conversation went astray.
To deviate from the main topic.
議論が本題から逸れてしまった。
The discussion went astray from the main point.
道に迷う is the general term for getting lost (losing one's way). 迷子になる specifically means becoming a lost child, but can be used for adults in a self-deprecating or humorous way, especially in crowded places like stations or department stores.
駅で迷子になりそうになった。
I almost went astray at the station.
Avoid directly translating 'go astray' as 迷いに行く or similar. The natural Japanese depends heavily on context: physical lostness, moral straying, or deviation from a plan.
ハイカーたちは霧の中で道に迷った。
The hikers went astray in the fog.
適切な指導がないと、多くの若者は道を踏み外す。
Many young people go astray without proper guidance.
荷物が行方不明になって、結局届かなかった。
My package went astray and never arrived.