Where does “第一列島線” come from?

第一列島線 (Japanese) comes from Japanese 線 — line; level; beam.

第一列島線 (Japanese): the first island chain

Definitions

  1. the first island chain

Ancestry of “第一列島線”, step by step

第一列島線 traces back through 3 separate lines of ancestry.

via Japanese

StepLanguageWordMeaning
1Japaneseline; level; beam

via Japanese 第一

StepLanguageWordMeaning
1Japanese第一first; foremost; number one

via Japanese 列島

StepLanguageWordMeaning
1Japanese列島archipelago, chain of islands; Japanese...
Every word from Japanese
第一列島線 — Etymology, Origin & Word History | Etymology Explorer