Share prices finished the session lower, with investors unwilling to make bets before the Bank of Japan's policy board concludes its two-day meeting tomorrow, dealers said. They said the fact that foreign investors were net sellers in their pre-opening orders, for the first time in three trading days, also weighed on market sentiment. The Nikkei 225 Stock Average ended 98.53 points or 0.6 pct lower at 15,627.49, off a low of 15,553.14. The broader-based TOPIX index of all first-section issues lost 12.29 points or 0.8 pct at 1,605.58, after touching a low of 1,595.93. Decliners led gainers 1,170 to 436, with 86 issues unchanged. Volume rose to 1.73 bln shares from 1.64 bln yesterday.