This is the 9323rd most frequent Japanese word.
直樹
"直樹" (Naoki) is a Japanese given name meaning "honest tree" or "straight tree," depending on interpretation.
In this example, "直樹" is utilized as an object in the sentence structure, specifically as the source from whom the book was borrowed.
彼女は本を直樹から借りた。
She borrowed a book from Naoki.
In this sentence, "直樹" is used as a proper noun referring to a person's name.
直樹は毎日サッカーを練習している。
Naoki practices soccer every day.
Here, "直樹" is used as a declarative identification, representing someone's name as a subject in the sentence.