noun
leading figure; prominent person; bigwig
Refers to a person who is a central, influential, or highly respected figure in a field, organization, or community.
彼は業界の大立者として知られている。
He is known as a leading figure in the industry.
地元の大
The prominent local figures gathered and held a meeting.
noun
star actor; leading performer
Specifically used for the top actor or star performer in a theatrical troupe or similar performing group.
その劇団の大立者は、毎回公演の主役を務める。
The star actor of that troupe plays the lead role in every performance.
大物 also means a big shot or important person, but often emphasizes scale or power, while 大立者 focuses more on being a central, respected figure.
重鎮 refers to a person of great authority and influence, often with a nuance of seniority and gravitas, whereas 大立者 can be used more broadly for any leading figure.
Compound of 大 (おお, 'big') + 立つ (たつ, 'to stand') + 者 (もの, 'person'). The exact historical derivation is uncertain, but it likely refers to someone who 'stands out' prominently.