Japan should improve working conditions for part-time and contract workers and try to bring conditions for this sector of the workforce more in line with regular employees, an advisory panel to the labor ministry urged in a report released Friday.

In addition, social security systems, such as pension programs, should be introduced for part-time workers, the report to the Health, Labor and Welfare Ministry said.

It said wages for nonregular workers, who number 12 million, have been kept low.