A set of textbooks and workbooks on the social security system. Both the textbook and workbook have only been lightly flipped through, but the workbook has some creases. If you wish, I can also include a mock test, although there may be some writing in it. - Title: Social Security System - Table of Contents: Overview of the Social Security System, Public Pension System, Medical Insurance System, Nursing Care Insurance System, Labor Insurance System - Content: Detailed explanations of social security and a workbook to deepen understanding of the system. Thank you for looking.