backside part of the shamisen's neck where it meets the body
Specialized term used in shamisen construction and repair; refers to the curved area at the base of the neck.
A crack appeared in the backside part of the shamisen's neck where it meets the body, so I sent it for repair.
The name 猿尾 (literally 'monkey tail') likely refers to the shape of this part of the shamisen, which resembles a monkey's tail. The exact origin of the term is uncertain.