Despite plaudits from the international community, Japanese business remains critical of the Democratic Party of Japan's pledge to reduce greenhouse gas emissions by 25 percent from 1990 levels by 2020.

The Japan Business Federation (Nippon Keidanren), the country's most powerful business lobby, said Monday the DPJ should provide more evidence that the target is fair and feasible in terms of global competitiveness and cost.

"As far as the midterm target goes, the government needs to reach a public consensus after examining it further," Keidanren head Fujio Mitarai said at a news conference in Tokyo. The lobby includes the country's biggest polluters, such as steel companies and utilities.