This is the 7296th most frequent Japanese word.
久木
"久木" (Hisaki) is a Japanese name, typically used as a surname or given name, meaning "long-lasting tree."
In this sentence, 久木 (Hisaki) is used as a proper noun representing a person's name, common in formal contexts.
久木さんは学生時代、剣道部に所属していました。
Mr. Hisaki was in the Kendo club during his student days.
Here, 久木 is referred to as a unique name, highlighting its significance or rarity.
久木という名前は珍しいですね。
The name Hisaki is quite uncommon, isn't it?
In this example, 久木 is used as a descriptor or name of a location, possibly a forest named Hisaki.