Japan is facing a declining and aging population at a high speed that is not like any other in the world. While the decline in the working population is a drag on economic growth, the increase in the elderly population is a factor in the increase in social security benefits. In this class, students will start with a simple question about what the social security system is in the first place, learn basic knowledge and history of the current system, and then study the ideal way of future-oriented social security. I would like to provide students with an opportunity to understand the state of the current system and to think about the ideal way of the social security system from the viewpoint of solving social problems rather than those without a system.