防災

1. Origins, structure, and basic meaning

• Structure: 防災 (ぼうさい) is a compound noun for preparation and response intended to prevent or reduce disaster harm.
• Basic usage: 防災訓練を行う modifies an earthquake-preparedness drill, while 防災用品を置く modifies emergency supplies stored near an entrance.

2. Common pitfalls and similar expressions

• Response practice and emergency supplies
  • 防災訓練 practices response procedures, whereas 防災用品 are objects for an actual emergency. Stocking supplies does not mean training has been completed.