金脈

1. Origins, structure, and basic meaning

• Structure: 金脈 (きんみゃく) is a noun for a literal gold vein or, figuratively, a promising source of profit.
• Basic usage: 金脈を探す concerns ore in the mountains; 市場を金脈と見込む evaluates a market as a future source of earnings.

2. Common pitfalls and similar expressions

• Literal vein and profit-source metaphor
  • Mountains and exploration select the geological sense, while a company and market select the commercial metaphor.