This is the 4255th most frequent Japanese word.
俊之
"俊之" is a Japanese male given name, meaning "talented" or "excellent (俊)" combined with "of/possessing (之)."
In this sentence, 俊之 functions as a given name, referring to a specific individual enhancing their professional capabilities.
俊之さんは仕事で成果を上げました。
Mr. Toshiyuki achieved great results at work.
Here, 俊之 refers to a Japanese given name as an example in a general context.
俊之という名前は日本でよく見られます。
The name Toshiyuki is commonly seen in Japan.
In this instance, 俊之 is used to denote a specific individual, identified as a friend of the speaker.