noun
influential person; powerful person; big wheel
Refers to someone with real power or influence, often behind the scenes. Can be used in politics, business, or any organization.
彼は党内の実力者として知られている。
He is known as a powerful figure within the party.
あの会社の実力者は表に出ない。
The real power behind that company stays out of the spotlight.
大物 is a more casual term for a big shot or heavyweight, often used in entertainment or sports, whereas 実力者 is more formal and focused on real influence.
Compound of 実力 (real ability/power) and 者 (person).