Famitsu publisher, Enterbrain, have opening weekend sales figures for the PlayStation Vita’s Japan launch. These cover the 17th and 18th of December.
Enterbrain report that the PlayStation Vita sold 321,407 units in its first two days. For comparison, they also provide their figures for the PSP and 3DS launches:
PSP (December 2004): 166,074 [in 1 day]
3DS (February 2011): 371,326 [in 2 days]
We should learn more about the Vita launch on Wednesday when Media-Create release their weekly hardware and software sales chart.