noun
wealthy person; person of means
Refers to someone with substantial assets, often implying inherited wealth or property. Slightly formal; in casual speech お金持ち is more common.
彼の祖父は地元の資産家だった。
His grandfather was a wealthy person in the area.
資産家の家に生まれたが、質素な生活を送っている。
Though born into a wealthy family, he leads a simple life.
Refers to a very wealthy person, often with a nuance of great fortune or tycoon; stronger than 資産家.
Compound of 資産 (assets, property) and 家 (person, specialist). The exact historical derivation is uncertain, but the word follows a common pattern for describing a person characterized by the preceding noun.