This is the 8088th most frequent Japanese word.
室井
"室井" is a Japanese surname and does not have a direct standalone meaning.
The word '室井' here is used as a proper noun, specifically a surname, identified by the suffix 'さん' that typically denotes respect.
室井さんは映画に出演しています。
Mr. Muroi appears in a movie.
In this sentence, '室井' is again used as a surname, with the addition of '課長', meaning 'Section Manager', indicating the person's title.
この書類は室井課長にお渡しください。
Please give this document to Section Manager Muroi.
Here, '室井' is used as a surname associated with a unique method or style, with '式' referring to a formula or process, indicating the person Muroi's contribution or innovation.