In an effort to curtail surging vegetable imports to Japan, the Agriculture, Forestry and Fisheries Ministry will effectively introduce curbs on the volume of products that are permitted to clear quarantine, ministry sources said Thursday.

According to the sources, if violations of the law, such as soil remaining on the produce, are spotted, Japan will call on the exporting country to impose restrictions on exports.

These steps are likely to be criticized by vegetable exporting nations, including China and South Korea, observers said.