Japanese maple vs maple

Japanese maple and maple both are nouns.

Word	Noun	Adjective	Verb	Adverb
Japanese maple	Yes	No	No	No
maple	Yes	No	No	No

As nouns, maple is a hypernym of Japanese maple; that is, maple is a word with a broader meaning than Japanese maple:

Japanese maple: leaves deeply incised and bright red in autumn; Japan
maple: any of numerous trees or shrubs of the genus Acer bearing winged seeds in pairs; north temperate zone

As nouns, maple is a hypernym of Japanese maple; that is, maple is a word with a broader meaning than Japanese maple:

Japanese maple: ornamental shrub or small tree of Japan and Korea with deeply incised leaves; cultivated in many varieties
maple: any of numerous trees or shrubs of the genus Acer bearing winged seeds in pairs; north temperate zone

Japanese maple (noun)	maple (noun)
leaves deeply incised and bright red in autumn; Japan	any of numerous trees or shrubs of the genus Acer bearing winged seeds in pairs; north temperate zone
ornamental shrub or small tree of Japan and Korea with deeply incised leaves; cultivated in many varieties	wood of any of various maple trees; especially the hard close-grained wood of the sugar maple; used especially for furniture and flooring