全国

1. Origins, structure, and basic meaning

• Structure: 全国（ぜんこく） means an entire country.
• Basic usage: Use 全国の店 for a nationwide distribution or 全国から for people or things gathering from across the country.

2. Common pitfalls and similar expressions

• Nationwide versus every shop
  • 全国の店で販売 describes sales across the country.
  • すべての店で販売 means sales at every shop, a stronger claim that leaves no individual shop out.