China, the biggest buyer of Japan's seafood exports, said it would also strictly review the documents for food, especially aquatic products, from other parts of Japan, customs said in a statement.
China customs said it would continuously strengthen the detection and monitoring of radioactive substances to ensure the safety of food imported from Japan in banning food from 10 prefectures.
The move was to prevent the export of radioactive contaminated Japanese food to China and protect the food safety of Chinese consumers' imports, China said.
For weeks China had publicly voiced strong opposition to Japan's move to discharge treated radioactive water from its crippled Fukushima nuclear plant into the sea.
The United Nations nuclear watchdog, the International Atomic Energy Agency (IAEA), this week gave Japan the green light to begin discharging more than a million metric tons of water used to cool the plant's fuel rods after it was wrecked by a 2011 tsunami.
China customs said the report did not fully reflect the views of all the experts involved in the assessment process, and the conclusions were not unanimously endorsed by the experts.
It comes as South Korea's government said on Friday it respected the IAEA review and that it met international standards.
Seoul had announced its own assessment after the IAEA approved the Japanese plan despite concerns over safety in neighbouring countries.
"Based on a review of the treatment plan of contaminated water presented by Japan, we have confirmed concentration of radioactive material meets standards for ocean discharge ... and therefore the plan meets international standards including those of the IAEA," Bang Moon-kyu, Minister of the Office for Government Policy Co-ordination, told reporters.
Bang said South Korea respected the findings of the IAEA as the report was based on a task force of global experts set up by an established international agency.
The plan to discharge the treated water from the Fukushima plant is also expected to "not have any meaningful impact on our ocean areas", Bang said.
