TOKYO, March 25 (Reuters) – Japan’s Nikkei share average edged up on Wednesday as investors loaded up on stocks before they go ex-dividend later this week, but gains were limited by concerns that the market was looking technically overbought after a long rally.

The Nikkei benchmark rose 0.2 percent to 19,746.20 points after traversing positive and negative territory. It was an inch away from its 15-year high closing level of 19,754.36 hit on Monday.

The broader Topix gained 0.3 percent to 1,592.01 and the JPX-Nikkei Index 400 advanced 0.4 percent to 14,475.35.

(Reporting by Ayai Tomisawa; Editing by Kim Coghill)