Business Green: Japan could be set to boost green car technology by introducing generous subsidies that could cut the cost of new hybrids by up to a quarter. The country is already home to the world’s two largest producers of hybrid cars, and now government officials are considering including subsidies of up to 300,000 yen ($3,000/£2,000) for buyers of hybrid cars and other low emission vehicles as part of the country’s economic stimulus package. According to reports in the Nikkei paper over …