Where does “北極洋” come from?

北極洋 (Japanese) comes from Japanese 洋, from Middle Chinese 洋.

Ancestry of “北極洋”, step by step

北極洋 traces back through two separate lines of ancestry.

via Japanese 洋

StepLanguageWordMeaning
1Japanese洋an ocean; the East or "especially" the West;...
2Middle Chinese洋—

via Japanese 北極

StepLanguageWordMeaning
1Japanese北極Short for 北極圏. north polar region, north pole;...
Every word from Middle Chinese 洋 →Every word from Japanese 洋 →