What a katsu curry can tell us about the Japanese economy

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We speak to the creator of the Katsu Curry Index about what the price of the iconic Japanese dish can tell us about the yen, inflation and the country's tourism boom. Elsewhere we dig into the Chinese economic data released today and ask if European companies should be worried by a retail spending slowdown in the world's second-largest economy. World Business Express - Finance, economy and business news from BBC journalists around the world. The stories that matter.