帝政

1. Origins, structure, and basic meaning

• Structure: The spelling is 帝政, read as ていせい. It is a noun for a political system or historical period in which an emperor stands at the center of state power.
• Basic usage: A transition from imperial rule to republican government appears in 帝政から共和政への移行, while a long period of imperial rule ending appears in 長い帝政が終わる.

2. Common pitfalls and similar expressions

• Difference from 王政
  • Both involve monarchy, but this word specifically denotes rule by an emperor rather than rule by a king or queen.