非ひ公こう開かい

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Common wordJLPTN3Freq.FrequencyTop 10,000

Meanings

noun which may take the genitive case particle 'no', noun

Describes something not open to the public, such as meetings, events, data, or facilities. Often used in formal or official contexts.

〈事こと〉を非ひ公こう開かいにするto make something non-public/private
会かい社しゃはその会かい議ぎを非ひ公こう開かいにした。
The company made the meeting private.
非ひ公こう開かいの〈事こと〉non-public ~ (data, information, etc.)
非ひ公こう開かいのデータは一いっ般ぱんには見みられない。
Non-public data can't be viewed by the general public.
〈事こと〉が非ひ公こう開かいになるfor something to become non-public/closed
その裁さい判ばんは非ひ公こう開かいになった。
The trial was closed to the public.

秘ひ密みつN3
秘密 emphasizes deliberate confidentiality (a secret), whereas 非公開 simply means something is not made available to the public, without implying it must be hidden.
オフレコ
オフレコ specifically refers to spoken remarks kept out of published reports, while 非公開 is a broader formal term meaning 'not open to the public' used for documents, events, or data.

公こう開かいN1
公開 means 'open to the public,' while 非公開 means 'not open to the public'; they are direct opposites.
公こう表ひょうN2
非公開 means kept private or undisclosed, the direct opposite of 公表, which means making something public.
初はつ公こう開かいN2
初公開 describes the first public showing of something, whereas 非公開 means it is kept private and not shown to the public at all.
公こう開かい中ちゅう
非公開 means something is kept private or not released to the public, the opposite of 公開中, which means it is currently open to public access.

非ひ公こう式しきN3
非公式 means 'unofficial' (not formally sanctioned), while 非公開 means 'not open to the public'; something can be official yet non-public, or unofficial yet public.

Compound of 非 (hi, 'non-') and 公開 (kōkai, 'open to the public'). The prefix 非 negates the following noun, forming a straightforward antonym of 公開.