German Chancellor Angela Merkel left Berlin on Sunday for a six-day trip to China and Japan that is designed to underscore her commitment to the fight against global warming. In addition to a keynote address in Japan marking the 10th anniversary of the signing of the Kyoto protocol on climate change, Merkel is also likely to use her talks in Beijing to press China to do more to cut greenhouse gas emissions. Merkel is undertaking the trip in her dual capacity as leader of Europe's biggest economy and president of the Group of Eight (G8) club of rich industrial nations, according to a report of DPA news agency. Merkel desires to pursue closer cooperation on the environment, particularly through the promotion of energy efficiency, green technology and innovation. Officials in Berlin say Merkel will not shy away from difficult areas such as human rights and press freedom, which she is likely to raise as part of the run-up to Beijing hosting the 2008 Olympic Games. The chancellor's talks in both nations are likely to touch on the diplomatic drive for a solution to the nuclear ambitions of North Korea and Iran as well as the conflict in Afghanistan. For their part, German business leaders see the trip as helping to overcome the perception of the threat posed by China's burgeoning economy, especially in terms of cheap labour and product safety. They hope Merkel's visit will underscore the importance to German industry of China's rapid-pace economic change with the nation continuing to chalk up growth rates of about 10 per cent a year. But German business also wants to see some commitment from the Chinese on addressing concerns about intellectual property rights and product piracy. In addition to holding talks with Chinese President Hu Jintao and Prime Minister Wen Jiabao, Merkel is expected to meet cultural and civil rights groups in China and is to visit the German-Chinese Law Institute at the University of Nanjing. With Japan to take over the G8 presidency from Germany in 2008, Merkel's visit to Tokyo will also form part of the buildup to this. During her stay in the Japanese capital she is due to meet with both Emperor Akihito and the country's prime minister, Shinzo Abe. It will be Merkel's second visit to China as chancellor and her first to Japan. She arrives in Tokyo on Wednesday and also plans to attend the World Athletics Championships taking place in Osaka.