Yes, a librarian can perform searches on behalf of a user at a library counter as part of the library’s reference services.
Also, the librarian may provide the user with access to CiNii full text contents. In that case, the library may collect a surcharge from the user.
For more information on how to apply for an ID as a librarian, see: Can an ID be applied with a library's name?
*Note: When a librarian provides users with CiNii Articles、CiNii Books、CiNii Dissertations content, it should be done in accordance with the regulations.