Nikkei set to scale fresh multiyear highs on weak yen, Wall St record

TOKYO, May 16 (Reuters) - Japan's Nikkei stock average is expected to score fresh multi-year highs on Thursday on the yen's persistent weakness against the dollar and record highs for U.S. stocks overnight, but buyers may become more conservative given the rapid pace of recent gains. Market players said the Nikkei was likely to trade between 15,000 and 15,250, after rising 2.3 percent to end at 15,096.03, the highest level since January 2008. Nikkei futures in Chicago closed at 15,185 o