Sony representatives did not discuss details of the unit or the exact timing of the release but one spokesperson told Britain's PC the new device would be released before Christmas.
Sony's Tablet S and Tablet P models run Google's Android operating system, but it is unclear whether the upcoming tablet will stay with that OS or offer something different such as Windows 8, CIO Asia said.
Sony could choose to offer different models of the new tablet for both Windows 8 and the next version of Android, 4.1 Jelly Bean.
Windows 8 will launch by the end of October and almost all vendors are looking to offer a tablet for Microsoft's OS.
Sony was not alone in announcing tablet plans, as HTC told PC Advisor it would be launching a follow-up to its Flyer tablet in Britain.
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