Japan's top currency diplomat Masato Kanda warned Wednesday of market intervention to rectify excessive yen moves, led by speculators, saying that he does not see any limits to the country's potential forays amid market chatter of official yen-buying in recent days.Kanda, the vice finance minister for international affairs, told Kyodo News in an interview that various factors can move foreign exchange rates but speculation is "the biggest."Japanese officials, including Kanda, have not confirmed whether the government and the Bank of Japan have stepped into the market, though market sources …READ FULL ARTICLE