Business sentiment among large Japanese manufacturers has worsened for the first time in a year, partly because of worries about US President Donald Trump's tariffs, according to a survey by Japan's central bank released Tuesday. The Bank of Japan's tankan quarterly survey said an index for large manufacturers that shows the percentage of companies foreseeing good conditions minus those feeling pessimistic fell to plus 12 from plus 14 in December, the first dip in four quarters. Major manufacturers include the key auto and electronics sectors, whose exports to the US are a major driver for the Japanese economy.