Comes third hand via the Digital Reader Blog via lesen.net:
Sony has confirmed today that they will not be making another ebook reader – not even for their sole remaining market in Japan.
There will be no PRS-T4, and lesen.net reports that the remaining stock of the Sony Reader PRS-T3 will be sold until it runs out. That device was was launched last fall in Europe but never shipped in the US, so I’m not sure how many people actually have one.
TBH, this comes as no surprise. After Sony first pulled out of the North American ebook market, and then a short while later abandoned Europe and Australia, there was little reason for Sony to develop a new model
Expected but still...
Hindsight being 20-20; they did have an amazing knack of zigging when the market was zagging.