倭琴

Probably coined in Japan of Middle Chinese-derived components, as a compound of 倭 (wa, “Japan, Japanese”) +‎ 琴 (gon, “koto, zither”).

• 和琴

• (Tokyo) わごん [wàgóń] (Heiban – [0])^[1]
• IPA^(key): [β̞a̠ɡõ̞ɴ]

倭(わ)琴(ごん) • (wagon) 

1. alternative spelling of 和琴: (music) a six-stringed koto or zither used to perform kagura music, more common in ancient times

The 和琴 spelling is much more common, due to the dwarf connotations of the 倭 character.

Compound of 倭 (Yamato, ancient name for Japan) +‎ 琴 (koto, “a koto, a zither”).^[2] The koto changes to goto as an instance of rendaku (連濁).

• 大和琴

• (Tokyo) やまとごと [yàmátógóꜜtò] (Nakadaka – [4])^[1]
• IPA^(key): [ja̠ma̠to̞ɡo̞to̞]

倭(やまと)琴(ごと) • (yamatogoto) 

1. alternative spelling of 大和琴: (music) a six-stringed koto or zither used to perform kagura music, more common in ancient times

The 大和琴 spelling is much more common, due to the dwarf connotations of the 倭 character.