The Nikkei gained 337.61 points, or 2.29 per cent, to end at 15,096.03. It was the first time the Nikkei had closed above the psychologically important 15,000 mark since December 28, 2007.
The broader-based Topix index was up 22.05 points, or 1.79 per cent, at 1,252.85.
A weaker yen makes Japanese goods less expensive abroad and improves repatriated earnings.//DPA