Japanese Wasabi tested Radioactive
Hong Kong has decided to implement more checks after low levels of radiation from the quake-hit Fukushima nuclear power plant was detected in northeast Heilongjiang.
Fears of radioactive contamination of food increased after wasabi plants in Fukushima prefecture were also found to be tainted.
Meanwhile, radiation levels in some vegetables produced in Fukushima, Chiba and other prefectures were higher than legal limits, Japanese authorities said.
In Fukushima, above-normal radiation in milk, wasabi plants and 11 other vegetables was detected.
The number of radiation-affected food is likely to increase as each prefecture begins testing its produce, said an official at the Japanese health, labour and welfare ministry.
Japan plans to urge other nations to observe World Trade Organization rules after the United States, China and others halted imports of some Japanese food products over radiation concerns.
Trade rules require restrictions on imports and exports to have a scientific basis.
This follows on from the concern shown by Australia earlier this week.