Japanese deity vs immortal

Japanese deity and immortal both are nouns.

Word	Noun	Adjective	Verb	Adverb
Japanese deity	Yes	No	No	No
immortal	Yes	Yes	No	No

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

Japanese deity: a deity worshipped by the Japanese
immortal: any supernatural being worshipped as controlling some part of the world or some aspect of life or who is the personification of a force

Other hypernyms of Japanese deity include deity, divinity, god.

Japanese deity (noun)	immortal (noun)
a deity worshipped by the Japanese	any supernatural being worshipped as controlling some part of the world or some aspect of life or who is the personification of a force
	a person (such as an author) of enduring fame

Japanese deity (adjective)	immortal (adjective)
	not subject to death