The Nikkei stock index climbed over 2 percent Thursday morning, led by exporters as the yen briefly plunged to the lower 147 zone versus the U.S. dollar on Japanese Prime Minister Shigeru Ishiba’s dovish comments. The Nikkei soared over 1,000 points at one point after Ishiba said Wednesday that he believes the current environment is not suitable for another interest rate hike after holding talks with Bank of Japan Governor Kazuo Ueda. The 225-issue Nikkei Stock Average rose 846.27 points, or 2.24 percent, from Wednesday to 38,655.03. The broader Topix index was up 38.22 points, or 1.44 percent…