Where does “Osaca” come from?

Osaca (Portuguese) comes from Japanese 大阪, from Japanese 大, from Old Japanese 大, from Proto-Japonic əpə — big, large; many.

Ancestry of “Osaca”, step by step

StepLanguageWordMeaning
1Japanese大阪large hill; Osaka
2Japanese大big, large; the large part of; arch-
3Old Japanese大big, large; large
4Proto-Japonicəpəbig, large; many
Every word from Proto-Japonic əpə →Every word from Old Japanese 大 →Every word from Japanese 大 →