noun
General term for an empire, a large political unit ruled by an emperor.
ローマ帝国は広大な領土を持っていた。
The Roman Empire had vast territory.
彼は自分の会社を小さな
He runs his company like a small empire.
noun
Empire of Japan
Abbreviation of 大日本帝国 (Dai Nippon Teikoku), the historical Empire of Japan (1868–1947). Used in historical or political contexts.
See also: 大日本帝国
帝国海軍は太平洋戦争で大きな役割を果たした。
The Imperial Japanese Navy played a major role in the Pacific War.