Japan's consumption of sliced raw tuna is undergoing a major upheaval as the surge in supply of farmed tuna brings down prices and threatens to decimate tuna stocks.

Representatives of the Turkish tuna-growing industry visited Japan at the end of last month and met with officials at the Fisheries Agency and environmental protection groups.

They said Turkey is adhering to international fishing rules and wants to press ahead with gathering data and conducting surveys on tuna resources in cooperation with Japan.