also: せいりょっか
noun
influential person; person of power
Refers to someone with social, political, or economic influence. Often used in formal or written contexts.
彼は地元の勢力家として知られている。
He is known as a local man of influence.
その政策は一部の勢力家によって決められた。
That policy was decided by a handful of influential people.
Compound of 勢力 (power, influence) and 家 (person, specialist). The reading せいりょっか is a colloquial contraction.