The government is considering issuing bonds that would be repaid solely with money raised from structural reforms, government sources said Monday.

The special bonds would help the government cope with possible economic emergencies amid the prolonged slump, they said.

The idea of what some are calling "Koizumi bonds" would not contradict Prime Minister Junichiro Koizumi's pledge to limit annual bond issuance to under 30 trillion yen because the source of redemption would be clearly identified in advance, such as sales of national assets and consolidation of semigovernmental firms, the sources said.