The Japanese unit of Chinese solar panel maker Suntech Power Holdings Co., backed by its competitive edge in Japan's highly potential solar panel market, is looking to more than double its sales next year after suffering unexpected supply disruptions this year.

The world's largest solar module maker has also set its sights on a double-digit market share in 2012. Its share stood at 5 percent last year, fifth from the top.

The bullish outlook comes from the rising demand for renewable energy amid the Fukushima nuclear crisis. Also, the government's planned launch of a feed-in tariff next July is likely to lure more global companies to Japan's burgeoning solar power generation business.