改かい氏し

noun

change of surname

Formal term used in legal, administrative, or genealogical contexts for changing one's family name.

• 婚こん姻いんに伴ともなう改かい氏しの手て続つづきについて教おしえてください。

  Please tell me about the procedure for changing one's surname upon marriage.

• 改かい氏し届とどけを役やく所しょに提てい出しゅつした。

  I submitted the surname change notification to the government office.