Shami-chōrō - 三味長老 - [yokai]
• About this Yokai: A finely crafted, antique Shamisen that was played by an absolute master, but after the incredible performance, it was only ever played on by novices, who neglected practice for the rest of its career. Now a Tsukumogami: it plays a forlorn melody, lamenting the time that it was played by an adept hand. This sad century old shamisen has fallen out of tune..
• History & early appearances: Shamisen are popular, 3 stringed instruments played with a bachi (a large pick.) similar to a lute, banjo or guitar. - Instruments are often said to become Tsukumogami when they've been neglected by their owners,They are often depicted (humorously) seeking revenge against the musicians who've neglected their practice or repair for months or even decades at a time.
In modern bestiaries: its often seen playing along side Koto-Furunushi & Biwa-Boku-Boku, These three are often said to be a trio that play forgotten songs and tunes together as a band. - They serve as a reminder to practice diligently & to not let the old instruments & ways of playing be forgotten.