Where should I apply for a voluntary return of my driver's license?

You can voluntarily return your driver's license (cancellation of your driver's license) at the Driver's License Center or police department (excluding Yokohama Water police department).
For more information, please contact your local police department.
List of police department (Search from Address / Kanagawa Prefectural Police (outside site)）
※Even if you contact the City of Yokohama, Road and Highway Bureau Road Policy Promotion Section, you will not be able to provide guidance on procedures for voluntary return of your driver's license.

About cancellation (all) of driver's license application (Kanagawa Police Headquarters website) (outside site)

Kanagawa Prefecture Elderly Driver's License Voluntary Return Support (Kanagawa Police Headquarters website) (outside site)