Where does “日本国” come from?

日本国 (Japanese) comes from Japanese 日本, from Japanese 日, from Old Japanese 日, from Proto-Japonic *pi — day, sun.

日本国 (Japanese): State of Japan (de facto official name of Japan, 1947 to present)

Definitions

  1. State of Japan (de facto official name of Japan, 1947 to present)

Ancestry of “日本国”, step by step

日本国 traces back through two separate lines of ancestry.

via Japanese 日本

StepLanguageWordMeaning
1Japanese日本{{l|en|Japan}}; Japan
2Japanese日Sunday
3Old Japanese日the sun; sunlight, sunshine; daytime, daylight
4Proto-Japonic*piday, sun

via Japanese 国

StepLanguageWordMeaning
1Japanese国a land, a large place; a country in general, a...
2Old Japanese国—
Every word from Proto-Japonic *pi →Every word from Old Japanese 日 →Every word from Japanese 日 →