Nipponese vs geisha

Nipponese and geisha both are nouns.

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

As nouns, geisha is a hyponym of Nipponese; that is, geisha is a word with a more specific, narrower meaning than Nipponese:

Nipponese: a native or inhabitant of Japan
geisha: a Japanese woman trained to entertain men with conversation and singing and dancing

Other hyponyms of Nipponese include Ryukyuan, Jap, Nip, geisha girl, shogun.

Nipponese (noun)	geisha (noun)
a native or inhabitant of Japan	a Japanese woman trained to entertain men with conversation and singing and dancing

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