Chip-testing equipment maker Advantest sank 4.79 percent to 4,351 yen and chip-making equipment manufacturer Tokyo Electron gave up 3.84 percent to 20,395 yen. High-tech investor SoftBank Group fell 2.04 percent at 6,375 yen, Sony Group dropped 1.87 percent to 12,610 yen and Panasonic dived 3.18 percent to 1,565.5 yen.