This is the 10146th most frequent Japanese word.
野口
"野口" (Noguchi) is a Japanese surname meaning "field entrance."
In this context, '野口' is used as a surname, and 'さん' is an honorific suffix employed to show respect.
野口さんはいつも元気です。
Mr./Ms. Noguchi is always energetic.
Here, '野口' is again used as a surname, and the possessive particle 'の' signifies ownership or association, linking Noguchi to their hometown.
野口の出身地は東京です。
Noguchi's hometown is Tokyo.
In this sentence, '野口' operates as a geographical proper noun, denoting the name of a specific river.