親しん展てん

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

confidential; personal; to be opened only by addressee

Used on envelopes or documents to indicate that the contents are private and should be opened only by the named recipient.

• 封ふう筒とうに「親しん展てん」と書かいてある。

  The envelope is marked 'Confidential'.

• 親しん展てんの手て紙がみが届とどいた。

  I received a confidential letter.