The business confidence index for major Japanese manufacturers in September remained unchanged from three months earlier at 13, the Bank of Japan's Tankan survey showed Tuesday, reflecting increased demand for semiconductors, while automakers grappled with weak overseas sales.The index for large nonmanufacturers, including the service sector, rose to 34 from 33, the first improvement in two quarters, as retailers saw favorable sales of clothing and air conditioners amid unusual summer heat.The sentiment index for manufacturers such as carmakers and technology companies matched the average m…READ FULL ARTICLE