Translation guide
A person with assets worth several million units of a currency, typically dollars. In Japanese, this is expressed with specific terms for the ultra-wealthy, often using the word 億万長者 (okumanchōja) or the loanword マルチミリオネア (maruchimirionea).
Describing someone whose net worth is in the millions (often dollars).
The most common and natural Japanese term for a multimillionaire or billionaire. Literally 'person of hundreds of millions', it implies extreme wealth.
彼は若くして億万長者になった。
He became a multimillionaire at a young age.
その会社の創業者は億万長者だ。
The founder of that company is a multimillionaire.
Means 'very wealthy person' or 'magnate'. It can refer to multimillionaires but is broader, covering anyone with great wealth.
彼は一代で大富豪になった。
He became a multimillionaire in one generation.
Loanword from English. Used occasionally in business or media contexts, but sounds foreign and is less natural than 億万長者.
彼はシリコンバレーのマルチミリオネアだ。
He is a Silicon Valley multimillionaire.
Specifying that someone has assets worth several million yen/dollars.
Literally 'a person with assets of several million dollars'. A clear and precise way to describe a multimillionaire in dollar terms.
彼は数百万ドルの資産家として知られている。
He is known as a multimillionaire.
Means 'to have assets of several hundred million yen'. Since 1 million dollars is roughly 100 million yen, this is a natural Japanese equivalent.
彼女は数億円の資産を持つ投資家だ。
She is an investor with assets worth several million dollars.
Calling someone a multimillionaire casually or exaggerating their wealth.
General term for 'rich person'. In casual conversation, it can imply multimillionaire status without specifying the amount.
あの人は大金持ちだよ。
That person is a multimillionaire, you know.
Short for 'celebrity', but often used to mean a wealthy, glamorous person. Can imply multimillionaire status in a trendy context.
億万長者 specifically implies wealth in the hundreds of millions (億), making it closer to 'multimillionaire' or even 'billionaire'. 大富豪 is a broader term for 'very wealthy person' and can be used for anyone extremely rich, not necessarily a multimillionaire.
Do not translate 'multimillionaire' literally as 複数百万長者 or similar. Such phrases are not used in Japanese. Stick to 億万長者 or descriptive phrases.
He's a real multimillionaire, with multiple houses.