宝庫

1. Origins, structure, and basic meaning

• Structure: 宝庫(ほうこ) means a storehouse of treasures or, figuratively, a place rich in valuable things.
• Basic usage: It describes a wetland as rich in rare birds and plants.
  • この湿地は珍しい鳥や植物の宝庫だ。

2. Common pitfalls and similar expressions

• A storehouse and figurative richness
  • 倉庫(そうこ) is a facility for storing goods. 知恵の宝庫 emphasizes an abundance of useful wisdom rather than a physical warehouse.