Toyota Motor Corp. and SoftBank Group Corp. are among the 1,841 firms that will be placed in the highest trading tier when the Tokyo Stock Exchange implements its reorganization plan on April 4, the bourse operator said Tuesday.The restructuring by Japan Exchange Group Inc., known as JPX, is aimed at improving market availability and luring foreign investment.The current four trading sections will be reorganized into three -- "Prime," "Standard" and "Growth.""The goal (of restructuring) is not to whittle down the number of firms in the highest section," Hiromi Yamaji, 66, president of Japan…READ FULL ARTICLE