In this chapter, we conducted a card game based on the actual master plan of a local government in a high school class and investigated its effect. This game, based on the concept of futurability education, which refers to the ability to prioritize the future over immediate gains, aimed to promote sustainable decision-making. The game incorporated policies from the local government’s master plan, categorized into four categories. The students individually rated the policy priority and then made group decisions based on the assigned cost limitations. Subsequently, they repeated the process, considering the perspective of imaginary future generations. The game was conducted over 2 years with a total of over 600 students, and questionnaire was conducted 3 times, pre-class, post-class, and follow-ups, to assess its impact. Results showed a significant increase in students’ interest in environmental and social issues. This indicates that futurability education has the potential to arouse high school students’ interest in various contemporary social issues by enhancing their futurability and inspiring them to take action to solve them.