Worries over new SARS cases in China helped wipe two percent off top Hong Kong stocks and dented shares elsewhere in Asia. Oil prices rose after an attack on an Iraqi crude facility.
The Nikkei stock average closed up 0.36 percent at 12,163.89, its highest finish since August 2001, after rising as high as 12,195.66.
Toshiba Corp was among technology and auto stocks in demand in Japan ahead of a stream of earnings reports starting later in the day.
"The market has not yet fully factored in good earnings from the tech sector," said Norihiro Fujito, a senior investment strategist at Mitsubishi Securities.
Toshiba rose 1.3 percent after a bullish forecast by the Nihon Keizai newspaper on the electronics maker's earnings for both the past and current business years.
Nissan Motor Co gained 1.4 ahead of results that came out after the close of trade and showed an 11.9 percent jump in annual operating profits.




