The energy consumption for each process in the Japanese steel industry is estimated by a statistical process in order to evaluate the possibility of reducing energy consumption. The specific energy consumption for each product is estimated and also for crude steel produced from an integrated steel plant route and an electric are furnace route. The specific energy consumption is compared. The energy consumption can be estimated from the production amounts of products for each process and for crude steel. The energy consumption of blast furnaces is the largest and that of rolling and piping is the next largest. The specific energy consumption of crude steel produced from an integrated steel plant route is approximately 2.6 times as high as that of an electric are furnace route.