私し書しょ

noun

private document; personal letter

Refers to a document or letter that is personal or confidential, as opposed to official or public correspondence.

• この私し書しょは他た人にんに見みせられない。

  I can't show this private letter to anyone else.

• 私し書しょを整せい理りしていたら、昔むかしの手て紙がみが出でてきた。

  While organizing my personal documents, I found an old letter.