Japanese shares were up Wednesday as some export-oriented issues were lifted by a weaker yen and an overnight rally on Wall Street. The benchmark Nikkei 225 Stock Average gained 26.53 points, or 0.28 per cent, to close at 9,574.32. The broader-based Topix index was up 1.79 points, or 0.22 per cent, at 824.65, according to a report of the German Press Agency "DPA"