Tokyo, Sept. 29 (Jiji Press)--Sony Financial Group Inc. debuted on the Tokyo Stock Exchange's top-tier Prime section Monday, fetching the first quotation of 205 yen apiece, above the reference price of 150 yen. After rising to as high as 210 yen, the issue ended the morning session at 198.5 yen. With its parent, Japanese electronics and entertainment giant Sony Group Corp., working to con...