Many finance chiefs from the Group of Seven wealthy democracies on Friday expressed concern that China’s underpriced excess production has had a negative impact on the global economy, Japan’s top currency diplomat said. Masato Kanda, Japan’s vice finance minister for international affairs, also touched on currency issues, telling reporters in the northern Italian town of Stresa, “It’s all about taking appropriate action if there are excessive fluctuations.” The G7 meeting, which began Thursday night, comes at a time of considerable depreciation of the yen against the U.S. dollar. Kanda made th…