The Japanese to claim sushi is not under threat is akin to saying the sky will fall in. When they get home the Japanese must really laugh at the bullcrap that western countries and organisations believe.
Australia already sells farmed bluefin tuna to Japan for sushi.
"The southern bluefin tuna (Thunnus maccoyii) farmed in Australia is one of two species of bluefin tunas. Its close relative, the northern bluefin tuna (Thunnus thynnus), is being used to develop tuna farming industries in the Mediterranean, North America and Japan."
Go to Australian Aquaculture Portal
Successive reductions in annual fishing quotas in Australia waters "prompted a move away from canning to value adding through farming. The first experimental farm was established at Port Lincoln in 1991 under a tripartite agreement between the Australian Tuna Boat Owners' Association of Australia, the Japanese Overseas Fisheries Cooperation Foundation, and the South Australian Government. Over the past decade the farmed sector has grown to the point where around 98 per cent of the Australian southern bluefin tuna quota is now farmed.
Farming is undertaken by those operators who have access to part of the Australian quota and who possess the necessary farm lease sites, and the equipment and expertise to catch tuna. There are currently fifteen tuna farms on eighteen sites, which range in size from 20 to 30 hectares.
New areas off Port Lincoln have been opened up from 2003 when there is expected to be twelve farmers operating on twenty-five lease sites."
So all that froth and bubble by Japan at CITES is akin to loggers claiming only 500 year of Eucalytus regnans provide quality woodchips for toilet paper.
Japanese spin is palpable. The 'scientific whaling' crap is more of a con than the Year 2000 bug. The sad thing is that the CITES mob believe them.
Tiger Quoll
Snowy River 3885
Australia
Tuna ranching vs Tuna farming