The Associated Press reports that Japan will check all processed meats imported from the United States after a shipment was found last week with sausages containing beef in violation of regulations aimed at containing mad cow disease, an official said Monday. Last Friday, Japan suspended imports from Jobbers Meat Packing Co. after a 1,108-box shipment was found to include two types of sausages in 188 boxes that listed beef as an ingredient. Ministry officials have found that only one of the two types of problem sausage sent by the Los Angeles-based company actually contained beef, despite beef being listed on the labels of both types, Kyodo News agency reported. Inspectors at airports and ports currently check about 30 percent of processed meat products imported by Japan, regardless of the nation of origin, Kyodo said. Processed meats include sausages, ham and bacon. Last month Japan said it would suspend beef imports from a Nebraska processing plant after finding meat in a shipment that violated a regulation imposed over mad cow concerns. Plant owner Tyson Foods Inc. said the boxes of beef were mistakenly included in a shipment destined for export from its Tyson Fresh Meats plant in Lexington.