The Japanese Nihon Keizai Shimbun newspaper said today that Honda Motor will post a group operating profit of 580 billion yen ($4.34 billion) for the business year to the end of March, surpassing its estimate by 5.5 percent, according to Reuters. The news agency said that the business daily, without citing sources, said Japan's third-largest car maker had benefited from strong domestic sales and that a weak yen had boosted profits from overseas operations.