Mitsui & Co., Japan’s second-biggest trading company, will buy a 25 percent stake in Multigrain AG, a Sao Paulo-based grain handler, to secure increased supplies of soybeans from Brazil. [...] The purchase would help the company expand access to non- genetically modified soybeans, which Japanese consumers prefer. The U.S., which supplies about 75 percent of Japan’s soybean imports, has almost doubled the percentage of genetically modified beans it produces to 91 percent as of this year, from 54 percent in 2000, according to the U.S. Department of Agriculture.