noun
a fortune; a large amount of money
Refers to a substantial sum of money, often enough to be life-changing. Used in expressions like 一財産を築く (build a fortune) or 一財産を失う (lose a fortune).
彼は若くして一財産を築いた。
He built a fortune at a young age.
その絵は一財産の価値がある。
That painting is worth a fortune.