part; region; site; cut (of meat)
Refers to a specific part or area, most commonly of the body, but also used for cuts of meat, anatomical regions, or designated sites in technical contexts.
The intensity of the pain differs depending on the part of the body.
Please tell me the part that hurts.
This cut of meat is tender.
There are various cuts of beef.
The doctor identified the specific site of the pain.
箇所 is a neutral word for a spot or location in general, while 部位 is specialized for parts of a body or a designated technical/anatomical region.
部位 is typically counted with 箇所 when referring to distinct sites or regions, as in 三箇所の部位.
Compound of 部 (ぶ, 'part') and 位 (い, 'position, rank'), referring to a specific location or part. The exact historical derivation is uncertain, but the meaning is transparent from the components.