Japanese cedar vs Cryptomeria japonica

Japanese cedar and Cryptomeria japonica both are nouns.

Word	Noun	Adjective	Verb	Adverb
Japanese cedar	Yes	No	No	No
Cryptomeria japonica	Yes	No	No	No

As nouns, Japanese cedar and Cryptomeria japonica are synonyms defined as:

Japanese cedar and Cryptomeria japonica: tall evergreen of Japan and China yielding valuable soft wood

Other synonyms of Japanese cedar include Japan cedar, sugi.

Japanese cedar (noun)	Cryptomeria japonica (noun)
tall evergreen of Japan and China yielding valuable soft wood	tall evergreen of Japan and China yielding valuable soft wood