What part of Hosino's body pains him until Nakata fixes it for him?

• A. His knee
• B. His wrist
• C. His elbow
• D. His spine

Answer: (D)

Nakata’s unusual healing touch is the focus here. In Kafka on the Shore, Nakata can relieve certain physical pains simply by interacting with the person, and the moment with Hoshino centers on a pain in the spine being cured through that touch. The narrative describes Hoshino suffering specifically in his spine, and Nakata’s action alleviates that back-related pain, which is why the spine is the part referenced. The other body parts—knee, wrist, elbow—don’t correspond to the healing moment described, so they aren’t the focus of this event.