Japan issued certificates for fish exports to the European Union after it said only products that don't exceed radiation limits or are from areas unaffected by the Fukushima No. 1 nuclear accident would be allowed, the Fisheries Agency said.

Food produced in 12 prefectures closest to the Fukushima plant are required by the EU to be tested for radiation, according to the European Commission. Certificates of origin are required for products from other prefectures.

"So far we have issued documents to certify fish origins, as there were no exports of seafood from the 12 Japanese prefectures to Europe," Miho Wazawa at the trade office of the Fisheries Agency said Thursday in a phone interview.