懐ふところ刀がたな

noun

dagger; stiletto

A small concealed dagger carried inside the kimono, historically used for self-defense or ritual suicide.

• 武ぶ士しは懐ふところ刀がたなを帯おびていた。

  The samurai carried a dagger inside his kimono.

noun

confidant; right-hand man

Figurative use; refers to a trusted advisor or indispensable aide, often in political or organizational contexts.

• 彼かれは社しゃ長ちょうの懐ふところ刀がたなとして知しられている。

  He is known as the president's right-hand man.