TOKYO, April 7 (Reuters) - Japan's Nikkei average was up nearly 1 percent shortly after the opening on Thursday as falls in the prior two sessions took the market to levels investors found attractive, especially after convincing gains in the U.S. and other overseas equities markets.
But the Nikkei is seen likely to struggle to post strong gains as investors refrain from chasing shares on rallies due to uncertainty over Tokyo Electric Power Co's nuclear safety crisis and worries over lost output.
The benchmark Nikkei was up 0.9 percent at 9,685.65 points while the broader Topix gained 1.2 percent to 849.74. (Reporting by Chikafumi Hodo; Editing by Edmund Klamann)