Abstract
Since the 1990's, the importation of konnnyaku product from China to Japan has been increasing remarkably. For the same period, the comsuption of konnyaku product has been reducing. So, konnyaku manufacturres in Japan gets into managemental trouble, just now. One of the konnyaku manufacturres in Japan starts on the strategy of product differentiation by 'namaimo-hou', the special process for mashing Konnnyaku potate and manufacturing Konnyaku product. While the comsuption of special Konnyaku product -made in 'namaimo-hou- was very low in the past, it has been increasing slowly in the last 10 years. But, actual supply quantity is shorter than the potential demand of its product, owing to imperfection of supplier system. The advanced manugfacturres changes material procurement behavior, and the process for manufacturing product. They can diffferntiate their product from imported one, and one made by other manufacturres in Japan. And, they can sell their product at the profitable price.
