(treasuring something by) never taking (it) off the premises
もんがいふしゅつ
Noun, Particle
1.
(treasuring something by) never taking (it) off the premises
yojijukugo
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その秘伝のレシピは門外不出だ。
That secret recipe is never to be taken off the premises.
この古文書は、代々門外不出として大切に守られてきた。
This ancient document has been carefully protected for generations, never to be taken off the premises.
彼の研究データは、企業秘密として厳重に管理され、門外不出とされている。
His research data is strictly managed as a trade secret and is considered never to be taken off the premises.
伝統工芸の技術は、師から弟子へと口伝で伝えられ、門外不出のものが少なくない。
Traditional craft techniques are passed down orally from master to apprentice, and many of them are never to be taken off the premises.
その寺院に伝わる宝物は、門外不出の秘宝として一般公開されていない。
The treasures passed down in that temple are not open to the public as secret treasures never to be taken off the premises.
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