Over the past year, Sony’s PS Vita has been squeezed badly by the dazzling success of the Nintendo 3DS and the overall contraction of the video game market in the United States and Japan. After a brief rebound in sales during the holiday season, the Vita’s lack of pulse became again painfully evident this week. As the winter doldrums hit the Japanese game market, the Vita’s unit sales collapsed to just 9,000 during the week ending on January 20th, according to Famitsu. This is far below the 15,000 units the portable console managed during the same period in 2012, a level that was deemed dangerously low a year ago. To make things worse, Vita’s ancestor console PSP just hit 15,000 unit weekly sales level, thanks to the latest Digimon title. It is not often you see a one-year old console being outsold by 60% by its seven year old predecessor.