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One of the two screws is larger and has a prefectural seal affixed to it. I
want to determine its purpose and name.
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2017-01-28T19:29:18.907
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2017-01-28T20:02:33.717
2017-01-28T20:02:33.717
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What is the large silver "button" used to fasten rear Japanese license plate on vehicles called?
This seal is called 封印【ふういん】.

From [JAF](http://www.jaf.or.jp/qa/car/registration/07.htm) (the Japan
Automobile Federation):

> 封印の目的はナンバープレートの取り外しを防止するとともに、車両の盗難犯罪を防ぐ重要な役割があります。
>
> (Roughly, _The purpose of the seal is to block the detaching of the licence
> plate as well as being a preventative measure against motor vehicle theft._
> )
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2017-01-28T20:01:53.453
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2017-01-28T20:01:53.453
2020-06-17T08:18:27.500
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