expression, noun
someone of importance; a person of stature
Fixed expression meaning a person who has achieved a certain level of distinction or is worthy of note. Often used in contexts of recognition or accomplishment.
See also: 一角の人物
彼も今では一角の人間だ。
He is now a person of some importance.
一角の人間になるには努力が必要だ。
To become someone of stature, effort is necessary.
Synonymous expression; 人物 emphasizes the person's character or caliber more than 人間.
From 一角 (ひとかど, 'one corner' → 'a certain degree') + の + 人間 (にんげん, 'person'). The phrase literally means 'a person of one corner', implying someone who stands out or has achieved a notable position.