Hoping to cut down on tax evasion, a government advisory panel on economic and fiscal affairs will probably call for introduction of a taxpayer numbering system, panel sources said.

The Council on Economic and Fiscal Policy, headed by Prime Minister Junichiro Koizumi, is looking to include the recommendation in a paper on policy management to be put forward next month, the sources said Tuesday.

The numbering system would forestall tax evasion by keeping track of individual taxpayers' income in a more accurate and efficient manner, they said.