The number of corporate bankruptcies in Japan jumped 14.9 percent in April from the previous year to 1,087, with debts totaling 426.78 billion yen, and among them are contractors stung by a state crackdown on bid-rigging, Tokyo Shoko Research said Wednesday.

The debts went up 7.6 percent but were below the 1 trillion yen mark for 25 months in a row, the research agency said.

The number of firms that went under increased for the seventh consecutive month, but was the second-lowest figure for the month of April over the past 10 years.