The Japanese Koto consists of a
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Two strings stretched over a wooden drum-like resonator covered with snakeskin
A board zither with 13 silk strings and movable bridges
Two drums, one high drum and one low drum
Gongs and various tuned metal instruments suspended vertically
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A board zither with 13 silk strings and movable bridges

Explanation:

The "Japanese Koto" is a stringed instrument that belongs to the zither family. It was originally played by blind people in Japan. They were the only ones who could professionally play it. The Koto is also said to have been used by the Buddhist monks until it became very popular.

The koto originally consisted of 13 "silk" strings, which were deemed to be expensive yet musical. As of today, most koto instruments are only made of synthetic strings. It has movable bridges which allows it to be tuned. These bridges are called "ji."

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