津々浦々

1. Origins, structure, and basic meaning

• Structure: 津々浦々 (つつうらうら) is an idiomatic plural noun emphasizing every corner and settlement throughout a country.
• Basic usage: 国の津々浦々を歩く marks the full range traversed by a traveler, while 全国津々浦々に届ける marks all the destinations reached by product delivery.

2. Common pitfalls and similar expressions

• Traversed range and distribution destinations
  • In 津々浦々を歩く, を marks the range traversed, while in 津々浦々に届ける, に marks destinations. The idiom does not enumerate literal seaports only.