urban center vs Yokohama

urban center and Yokohama both are nouns.

Word	Noun	Adjective	Verb	Adverb
urban center	Yes	No	No	No
Yokohama	Yes	No	No	No

urban center (noun)	Yokohama (noun)
a large and densely populated urban area; may include several independent administrative districts	port city on southeastern Honshu in central Japan