Toyota Motor Corp gained 2.2 percent, Nissan Motor Co rose 1.6 percent and NTT Corp soared 3.0 percent. Traders also said that investors appear to be covering their short positions before the BOJ and Fed reviews. As of last Friday, the short-sell ratio stood at 39.7 after hitting 44.9 on Thursday, the second highest after a record high of 47.1 hit on June 10. Bucking the trend, Takata Corp dived 14 percent after a Bloomberg report that some of the company's bidders are considering the possibility of some form of bankruptcy proceedings for the troubled Japanese air bag maker. The JPX-Nikkei Index 400 gained 0.8 percent to 11,868.39.