Translation guide
How to express the concept of a trespasser in Japanese, from legal terms to casual warnings.
Referring to someone who illegally enters property, especially in legal or official contexts.
Standard legal term for a trespasser or intruder. Used in laws, signs, and formal reports.
不法侵入者は警察に通報されます。
Trespassers will be reported to the police.
General term for intruder or trespasser. Less formal than 不法侵入者 but still used in warnings and news.
侵入者を発見したらすぐに警備員を呼んでください。
If you spot a trespasser, call security immediately.
Describing someone who is on your land or in your building without authorization, often in everyday situations.
Literally 'person who enters without permission'. Natural way to describe a trespasser in conversation.
この土地に無断で立ち入る人はいませんか？
Are there any people trespassing on this land?
Another way to say 'person who enters without permission'. Slightly more casual.
許可なく入る人は見かけませんでした。
I didn't see any trespassers.
How to write or say 'No trespassing' or 'Trespassers will be prosecuted' on signs.
Standard sign phrase meaning 'No entry except for authorized personnel'. Equivalent to 'No trespassing'.
この先、関係者以外立入禁止です。
Beyond this point, no trespassing.
Shorter sign meaning 'No entry' or 'Keep out'. Often used on fences and doors.
立入禁止の看板があります。
There is a 'No Trespassing' sign.
Formal warning: 'Trespassers will be prosecuted/punished'. Seen on some private property signs.
不法侵入者は罰せられますのでご注意ください。
Please be aware that trespassers will be prosecuted.
Telling someone directly that they are trespassing or should leave private property.
Polite but firm way to say 'This is private property'. Implies they are trespassing.
すみません、ここは私有地ですよ。
Excuse me, this is private property.
Casual, direct way to tell someone 'You can't come in here'. Used among friends or to children.
おい、ここ入っちゃダメだよ。
Hey, you can't come in here.
侵入者 (しんにゅうしゃ) is a general intruder, while 不法侵入者 (ふほうしんにゅうしゃ) specifically means illegal trespasser. In legal contexts or formal warnings, use 不法侵入者. In everyday speech, 侵入者 or descriptive phrases like 無断で入る人 are more common.
The most common 'No Trespassing' sign in Japan is 関係者以外立入禁止. It literally means 'Entry forbidden except for concerned parties'. You'll see it on construction sites, private roads, and company grounds.