JAPAN - Evidence that business confidence in Japan slumped over the summer has sharpened fears that the country is on the verge of its fourth recession in a decade. The figures come from a quarterly Bank of Japan survey covering the July to September period, and take in the first few days following the terrorist attacks on the US. The survey, known as the "tankan", is seen as a key indicator for Japan's financial health. The headline "diffusion index" figure of minus 33 undershot both last