"Investors have been looking at the situation in the U.S. and Europe optimistically and have been buying shares, but that energy is exhausting itself," said Koji Toda, chief fund manager at Resona Bank Ltd. in Tokyo.
"Considering how much Japan has risen, it wouldn't be a surprise if we saw some correction given the slowing in the yen's declines and slowdowns in Europe and China," said Naoteru Teraoka, general manager at Tokyo-based Chuo Mitsui Asset Management Co.