Pacific vs Japanese Islands

Pacific and Japanese Islands both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pacific	Yes	Yes	No	No
Japanese Islands	Yes	No	No	No

Pacific (noun)	Japanese Islands (noun)
the largest ocean in the world	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

Pacific (adjective)	Japanese Islands (adjective)
relating to or bordering the Pacific Ocean