Where does “ローマ帝国” come from?

ローマ帝国 (Japanese) comes from Japanese ローマ, from Italian Roma, from Latin Rōma — Rome and/or Constantinople (the latter as "Nova Roma").

Ancestry of “ローマ帝国”, step by step

ローマ帝国 traces back through two separate lines of ancestry.

via Japanese ローマ

StepLanguageWordMeaning
1JapaneseローマRome, Roman
2ItalianRomaRome
3LatinRōmaRome and/or Constantinople (the latter as "Nova Roma")

via Japanese 帝国

StepLanguageWordMeaning
1Japanese帝国empire

Words derived from “ローマ帝国”

Every word from Latin Rōma →Every word from Italian Roma →Every word from Japanese ローマ →