Japanese bittersweet vs Japan bittersweet

Japanese bittersweet and Japan bittersweet both are nouns.

Word	Noun	Adjective	Verb	Adverb
Japanese bittersweet	Yes	No	No	No
Japan bittersweet	Yes	No	No	No

As nouns, Japanese bittersweet and Japan bittersweet are synonyms defined as:

Japanese bittersweet and Japan bittersweet: ornamental Asiatic vine with showy orange-yellow fruit with a scarlet aril; naturalized in North America

Other synonyms of Japanese bittersweet include Celastric articulatus, Celastrus orbiculatus, oriental bittersweet.

Japanese bittersweet (noun)	Japan bittersweet (noun)
ornamental Asiatic vine with showy orange-yellow fruit with a scarlet aril; naturalized in North America	ornamental Asiatic vine with showy orange-yellow fruit with a scarlet aril; naturalized in North America