Sony has claimed it's more than satisfied with the launch of PlayStation Vita and doesn't anticipate any problems shifting units in February.
Asked by an analyst if the handheld has been struggling, Sony executive vice president and chief financial officer Masaru Kato told investors (via Seeking Alpha):
"Now the company has not publicly announced the shipping unit - unit of shipping and sales, at the appropriate time, we would do so. But as far as the sell-through, three weeks have passed and sell-through is 500,000. This was announced on the 10th of January. So as a start, I think we had a very - a good start.
"Including software and hardware, we are carrying out the sales promotions and we do it to boost the sales, and we do not think we have any problems."
Vita sales got off to a decent start in Japan, but have tailed off in recent weeks. Since launch, weekly Vita sales have come in at 324,859 units, 72,479, 42,648, 42,915, 18,361, 15,219 and most recently 18,942.