Beijing has not renewed a license for a quarantine facility in Niigata Prefecture that inspects Japanese Nishikigoi carp, a move that comes amid heightened tensions between China and Japan over the release of processed radioactive water into the sea from the Fukushima nuclear plant. China is the largest importer of Nishikigoi carp from Japan, accounting for 19% of total exports, with Japan's exports of the fish doubling in the past decade. Japan has requested the suspension of Chinese imports of Nishikigoi carp, but Beijing has not yet responded.