四し半はん世せい紀き

noun

quarter of a century; 25 years

Used in formal or written contexts to refer to a 25-year period. Often appears in historical or commemorative expressions.

• この建たて物ものは四し半はん世せい紀き前まえに建たてられた。

  This building was built a quarter of a century ago.

• 四し半はん世せい紀きにわたる研けん究きゅうの成せい果かが発はっ表ぴょうされた。

  The results of a quarter-century of research were announced.