The authors adapted the original Jump$tart college questionnaire to measure the financial literacy for Japanese college students. With this questionnaire, we conducted a financial literacy survey among Japanese students at national and local public universities in July 2015. The results are as follows: （1） Japanese college students had the extremely low rate of correct answers in questions relating to long-term life planning, （2）Male students’ financial literacy was significantly higher than female students’ one, （3） Students majoring in the natural sciences scored significantly higher than did students majoring in the humanities or social sciences, （4）The mean rate of correct answers for American college students was much higher than that for Japanese college students in questions relating to borrowing, credit information, and taxes, and （5） The American college students also showed excellence in most questions in the cognitive category of “judgement.” Thus, this article concludes that financial education for life planning and decision-making is required for Japanese young people before their graduating from high school.

　　Business games aim to promote students’ rational decision-making skill through simulating the corporate management. But, in many cases, students’ decision-making in business games is limited to internal economies of a company and does not cover external economies affecting social infrastructure which supports business activities. Now the corporate behavior in a sustainable society is an issue people should discuss, it is necessary to let students learn external economies as well as internal economies in business games. We develop a business game of an environmental problem in which the concept of external economies is introduced. In this game, we set a situation where free riders who do not undertake social responsibility coexist with good-natured companies, and try to let students learn Corporate Social Responsibility （CSR） and a desirable type of economic system. This is a research report based on our development of a business game and its practice in class.