Nippon vs Asia

Nippon and Asia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Nippon	Yes	No	No	No
Asia	Yes	No	No	No

Nippon (noun)	Asia (noun)
a constitutional monarchy occupying the Japanese Archipelago; a world leader in electronics and automobile manufacture and ship building	the nations of the Asian continent collectively
	the largest continent with 60% of the earth's population; it is joined to Europe on the west to form Eurasia; it is the site of some of the world's earliest civilizations