直じき筆ひつ

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

one's own handwriting; autograph

Refers to something written by the person themselves, often used for letters, documents, or signed works. Can be used as a noun or with の to modify another noun.

• この手て紙がみは社しゃ長ちょうの直じき筆ひつです。

  This letter is in the president's own handwriting.

• 直じき筆ひつのサインが入はいった本ほんを買かった。

  I bought a book with the author's autograph.