adverb
in person; personally; oneself
Emphasizes that the action is done directly by the person, not through an intermediary. Often used in formal or respectful contexts.
社長が手ずからお客様にお茶を出した。
The company president personally served tea to the guest.
先生は手ずから賞状を渡してくださった
The teacher kindly handed me the certificate in person.