According to the World Bank, exports of fish products from piracy-hit countries have also suffered, declining by 23.8% since 2006, the year the report takes as the starting point of piracy.

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We stopped alongside the Sonobe River, where Miyamoto, as a boy, had caught fish with his hands, and I descended the bank and stared at the riffles for a while until I realized, with a start, that there were six or seven giant carp in a pool right by my feet.

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The World Bank has a programme in 100 districts using the fish and it will take another five years before the real impact would be known.

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About 60, 000 fish have been rescued from a Cheshire canal after a huge section of the bank collapsed.

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But one of the bank's maxims is that it has to be a big fish in a business, or not in it at all.

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Since 2006, the year the World Bank report takes as the starting point of piracy, exports of fish products from piracy-hit countries have declined by 23.8%.

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