Nipponese vs Japan

Nipponese and Japan both are nouns.

Word	Noun	Adjective	Verb	Adverb
Nipponese	Yes	Yes	No	No
Japan	Yes	No	No	No

Nipponese (noun)	Japan (noun)
a native or inhabitant of Japan	a constitutional monarchy occupying the Japanese Archipelago; a world leader in electronics and automobile manufacture and ship building
	a string of more than 3,000 islands to the east of Asia extending 1,300 miles between the Sea of Japan and the western Pacific Ocean

Nipponese (adjective)	Japan (adjective)
of or relating to or characteristic of Japan or its people or their culture or language