The re-emergence of Bovine Spongiform Encephalopathy (BSE) in EU is also affecting Japan.The first domestic case of a milk cow infected with BSE occured in September 2001. Therefore, an increasing consciousness of the need for the safety of feed is being seen in allied industries, and the rendering industry, which collects and renders animal waste from suppliers such as abattoirs, to produce meat and bone meal (MBM) and tallow, is in a situation condition to cope with the present situation. In this paper, we consider the conditions of sustainability for the rendering industry by ensuring the safety of a backward channel. The results obtained from the analyses are as follows. 1. In the average-scale rendering factory, by-products from domestic animals are coped with in one line, and it is unfortunately difficult for an average-scale renderer to equip with a new line in the present situation. It is necessary to separate line for materials which come from cattle with others to ensure the safety of rendering product from now on. 2. Before a milk cow infected with BSE appeared in Japan, Eliminating salmonellas was the highest priority of safety assurance in a rendering factory, and had obliged a renderer's management to be stringent. Since then, preventing BSE has been the most important problem, and it means the thorough activity to eliminte 'prion' that causes BSE. 3. Considering to the fact of present rendering industry situation and the urgency of this issue, it is necessary to give subsidiary for rendering industry due to their product marketing promotion activities, which in turn will improve their condition.
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