Our main methodology is farm business management and rural sociology based on field research. We have strong interest on family farming because Japanese agriculture is still on the process to reform from small family farming to large scale business farming. We are looking for the rural social system that harmonize business and self-sufficient farming, accumulation of field by farming company and protection of small part-time farming, efficient production and environment friendly farming; the goal is expand rural economy to overcome low income level in rural aria. Our study keywords are family farming, farm business development, sustainability of rural economy and many types of farmers, and alternative system to market oriented economy.