新しん旧きゅう交こう代たい

noun, noun or participle which takes 'suru'

replacing the old with the new; the old giving way to the new

Used for the transition or replacement of old things, systems, or people by new ones. Often implies a natural or scheduled turnover.

• 新しん旧きゅう交こう代たいの時じ期きに、新あたらしい社しゃ長ちょうが就しゅう任にんした。

  At the time of the old-to-new transition, the new president took office.

• この部ぶ署しょでは毎まい年とし、新しん旧きゅう交こう代たいが行おこなわれている。

  In this department, the old guard is replaced by the new every year.