The cost to insure debt of Marubeni Corp. is poised to rise the most this month of any Japanese company besides Tokyo Electric Power Co., reflecting concern an economic slowdown will make it more difficult to meet forecasts for record profit.

Credit-default swaps tied to Marubeni increased to 471 basis points as of Wednesday, from 260 basis points at the start of the month and 170 when the government on Sept. 20 cut its evaluation of corporate earnings.

Five-year swaps on Marubeni, the most indebted of Japan's major trading houses, are more than twice the average of 215 in an index of its peers in Asia, according to data compiled by Bloomberg. The contracts are also used to speculate on creditworthiness.