Translation guide
How to express the concept of a trespasser in Japanese, from legal terms to casual warnings.
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.
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.
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'.
Beyond this point, no trespassing.
Formal warning: 'Trespassers will be prosecuted/punished'. Seen on some private property signs.
Telling someone directly that they are trespassing or should leave private property.
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.
I didn't see any trespassers.
Shorter sign meaning 'No entry' or 'Keep out'. Often used on fences and doors.
There is a 'No Trespassing' sign.
Please be aware that trespassers will be prosecuted.