TOKYO - Business confidence among large Japanese manufacturers worsened in December from three months earlier for the second straight quarterly deterioration, the Bank of Japan's Tankan survey report said Friday, reflecting a decline in exports amid a slowdown in overseas economies and strained ties between Japan and China.

The index measuring sentiment among big manufacturers such as carmakers and high-tech firms stood at minus 12, hitting its lowest level since March 2010 when it came to minus 14, the central bank said. The latest figure was lower than the average forecast by economists of minus 10 in a Kyodo News survey.