Japan has launched a complaint against China at the World Trade Organisation to challenge antidumping duties levied by China on Japanese exports of high performance stainless steel seamless tubes, the WTO said. The complaint is the third brought to the global trade body by Japan this year and brings to 27 the total number of complaints launched in 2012, the most in almost a decade. The launch of the complaint triggers a 60 day period for China to try to settle the dispute, after which Japan can ask the WTO to appoint a panel of adjudicators to rule on its complaint.