It is a hard work to produce good fat. Cows are not raised only for being killed, cows in japan live a king's life. They are fed high quality grains and each farmer has their own mixture and secret ingredients, such as soybeans and okara. Water is very important for the cattle diet, local mineral water is often used to create the best quality product. To help the cows to eat more during the hot summer months, cows are fed beer or sake. The cows are raised in stalls to help create fatty marbling, so they are taken outside for leisurely walks in the afternoon to get some sun and fresh air.