China's Foreign Ministry says Beijing plans to step up inspection of seafood imports from Japan.

The move comes after the International Atomic Energy Agency on Tuesday issued a report on its review of Japan's plan to release treated and diluted water from the crippled Fukushima Daiichi nuclear plant into the sea.

The report says the plan is consistent with international safety standards.

Chinese Foreign Ministry Spokesperson Wang Wenbin said at a news conference on Wednesday that the truth and the accuracy of the data concerning the water are not proven. He also said the long-term impact of the water on food safety and people's health is not clarified.

He said the IAEA report was not able to calm voices in Japan and abroad that oppose the release. He stressed Chinese people have strong concerns.

Wang said relevant Chinese departments will step up monitoring of the marine environment, as well as inspection and quarantine of seafood from Japan.

Water used to cool molten nuclear fuel at the Fukushima plant mixes with rain and groundwater. The accumulated water is treated to remove most radioactive substances, but still contains tritium.

The Japanese government plans to dilute the water to reduce the tritium level to about one-seventh of the World Health Organization's safety standard for drinking water.