Nikkei plunged 2.35 percent Friday as yen\'s advance and renewed concerns over Cyprus\' bailout deal.The 225-issue Nikkei Stock Average ended down 297.16 points, or 2.35 percent, from Thursday to 12,338.53.The broader Topix index of all First Section issues on the Tokyo Stock Exchange was down 19.53 points, or 1.85 percent, at 1, 038.57.All 33 sectors declined, led by tire, steel and warehouse shares.The turnover was about 2,184.3 billion yen (about 23.01 billion U.S. dollars)