koto player vs player

koto player and player both are nouns.

Word	Noun	Adjective	Verb	Adverb
koto player	Yes	No	No	No
player	Yes	No	No	No

As nouns, player is a hypernym of koto player; that is, player is a word with a broader meaning than koto player:

Other hypernyms of koto player include instrumentalist, musician.

koto player (noun)	player (noun)
a musician who plays the koto	a theatrical performer
	a person who participates in or is skilled at some game
	someone who plays a music as a profession
	a person who pursues a number of different social and sexual partners simultaneously
	someone who takes part in an activity