The metropolitan government said that despite the results, there is no safety problem as the ground is covered with cement.

Soil pollution at the Tsukiji market, on top of groundwater contamination at the Toyosu district, where the food market is planned to be moved, is expected to affect Tokyo Governor Yuriko Koike's decision on whether to go ahead with the relocation plan.

In the Tsukiji survey, soil samples from 30 of the 111 survey points contained above-standard levels of toxic materials. (Jiji Press)