Asian country vs Nippon

Asian country and Nippon both are nouns.

Word	Noun	Adjective	Verb	Adverb
Asian country	Yes	No	No	No
Nippon	Yes	No	No	No

Asian country (noun)	Nippon (noun)
any one of the nations occupying the Asian continent	a constitutional monarchy occupying the Japanese Archipelago; a world leader in electronics and automobile manufacture and ship building