UPDATE 1-Japan tightens rules on foreign stakes in 518 firms, citing national security <!-- no image --> <div>* Toyota, Sony among 518 firms under new foreign ownership rules<div class="feedflare"> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=yPKFJovySR0:VRypkAXxFSk:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?d=yIl2AUoC8zA" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=yPKFJovySR0:VRypkAXxFSk:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=yPKFJovySR0:VRypkAXxFSk:V_sGLiPBpWU" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=yPKFJovySR0:VRypkAXxFSk:F7zBnMyn0Lo"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=yPKFJovySR0:VRypkAXxFSk:F7zBnMyn0Lo" border="0"></a> </div><img src="http://feeds.feedburner.com/~r/reuters/UKBankingFinancial/~4/yPKFJovySR0" height="1" width="1" alt=""></div> Posted by Reuters