Japanese shares advanced, pushing the Nikkei Stock Average 2.1% higher, thus crossing 15,000 mark, which is the highest level in six-moths, as investors supported Janet Yellen comments on remaining stimulus unchanged. The biggest gains in Japanese stocks reported Dai-ichi Life insurance, which rallied 4.3% after increasing profit forecasts, while Sony Corp. soared 3.7% before the release of the Sony Playstation 4 console.