Japanese consumer electronics firms Sony and Panasonic ace another two to three years of "poor profitability" if they do not regain their technological edge, Matt Jamieson, head of APAC Research with Fitch's corporate ratings group, told CNBC on Friday.

His comments come a day after Fitch cut Sony and Panasonic's , dealing another blow to two of Japan's tech heavyweights that have faced weak demand and intense competition from the likes of Samsung and Apple .