In this paper, an educational program for practical exercise based on OJE (On the Job Education) method has been described. The program consists of two parts; one is a long-term group seminar for a year to educate the planning and problem solving through aggressive self-developments, another is a short-term program for 2 days to educate leadership. In the group seminar, graduate students of engineering and economics have discussed. The procedure and the educational effect are described. OJE is an educational method which has been made a plan to generate the motivation. As the participants have given a good score in the evaluation to our educational method, it is recognized that OJE is an effective method.