(Corrects length of security review to seven months from five in paragraph 3) TOKYO :Taiwan's Yageo has succeeded in its $740 million unsolicited bid to buy Japan's Shibaura Electronics as a majority of shareholders tendered to its bid of 7,130 yen ($48.32) per share, it said in a filing on Friday. The bid's success concludes a long running tussle that was closely watched by investors as a test case for Japan's openness to unsolicited takeover bids as well as Japanese authorities' willingness