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In pictures: Japan's food crisis
Illegal sushi

A tuna is sliced carefully with a long sword-like knife the choicest cuts will be served as sashimi or sushi.

As the world has developed a taste for these Japanese delicacies, the pressure on tuna stocks has grown.

Japan has introduced a scheme to track where the most highly prized species, Bluefin tuna, was caught.

It hopes this will help to stamp out illegal catches.

Text: Chris Hogg
Pictures: James Cope

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