Tokyo, Sept. 3 (BridgeNews) - Japanese shares ended the morning session lower after fluctuating without clear direction in light trading volume despite the rebound made by U.S. shares on Friday. High-technology shares were one of the major victims with sentiment undermined by a steep fall in Hitachi Ltd. (JP;6501), which announced a steep downward revision of its earnings outlook. The Nikkei 225 Stock Average fell 75.14 points, or 0.7%, to 10,638.37.