This is the 10371st most frequent Japanese word.
鳥山
"鳥山" (Toriyama) means "bird mountain" and is also used as a Japanese surname.
In this sentence, 鳥山 is used as a proper noun, possibly referring to Akira Toriyama, a famous manga artist.
鳥山は最近新しい本を出版した。
Toriyama recently published a new book.
Here, 鳥山 is used as a common noun, potentially combining the words 鳥 (bird) and 山 (mountain) to refer to a location known for bird-watching or mountainous areas with birds.
この地区の鳥山は、観光客に人気があります。
The bird mountains in this area are popular among tourists.
In this instance, 鳥山 is used as a surname with the honorific さん, addressing someone formally.