Tokyo stocks opened lower Wednesday after an overnight decline on Wall Street and the locking in of gains after the Nikkei index’s four-day rally. In the first 15 minutes of trading, the 225-issue Nikkei Stock Average fell 212.08 points, or 0.78 percent, from Tuesday to 26,837.39. The broader Topix index was down 11.30 points, or 0.59 percent, at 1,896.08. On the top-tier Prime Market, decliners were led by rubber product, glass and ceramic product, and metal product issues. At 9 a.m., the dollar fetched 136.04-05 yen compared with 136.10-20 yen in New York and 135.75-76 yen in Tokyo at 5 p.m….