百ひゃく日にち天てん下か

noun

very short-lived regime; Hundred Days (Napoleon)

Refers to a brief period of rule, often used metaphorically for any short-lived administration. The literal historical reference is Napoleon's return from Elba in 1815.

• 彼かれの政せい権けんは百ひゃく日にち天てん下かに終おわった。