UA Zensen, a federation of labor unions in the Japanese retail and service industries, urged employers on Wednesday to create a manual of instructions to address the harassment of workers by customers.

The group also called on the government to enact a law that would oblige companies to take measures to address so-called customer harassment, saying such an act has a negative impact on the mental health of workers.

A survey by UA Zensen of about 33,000 workers showed that 46.8% of respondents had experienced customer harassment in the past two years.