The fattening of the Japanese Breed of Cattle was studied from the standpoint of farm management in relation to the Japanese Cattle. The study was carried out in Ato Town, Abu County, in Yamaguti Prefecture by examining into the farmers of the region. The following results were obtained: 1) The fattening enterprise of the Japanese Polled Breed of Cattle is on the increase in arithmetical progression year by year. Though the farmers still devote themselves to the cereal farming. It is not yet widely diffused in the farmers as regards the fattening of the Japanese Cattle. 2) The farmers, in general, do not look for the means of self-supporting and self-sufficing in respect of forage crops, and they depend on the purchased fodders. 3) The managerical technique is not appropriate for the fattening of the cattle. 4) The purchasing the “Motousi” (original cattle to be fattened)is not properly done,and the price is higher in comparison with the sale price of the fattened beef-cattle. 5) The fodder price and the management expense require large sum and the income becomes very small after all.