部ぶ外がい秘ひ

noun which may take the genitive case particle 'no'

restricted; confidential

Used for documents or information that should not be disclosed outside a specific department or group. Often seen as a stamp or label on internal materials.

• この資し料りょうは部ぶ外がい秘ひですので、関かん係けい者しゃ以い外がいに見みせないでください。

  This document is confidential, so please do not show it to anyone outside the relevant parties.

• 部ぶ外がい秘ひのファイルを誤あやまって外がい部ぶに送そう信しんしてしまった。

  I accidentally sent a restricted file to an outside party.