Nippon vs Nipponese

Nippon and Nipponese both are nouns.

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

Nippon (noun)	Nipponese (noun)
a constitutional monarchy occupying the Japanese Archipelago; a world leader in electronics and automobile manufacture and ship building	a native or inhabitant of Japan

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