Sony announced exactly a month ago that they are discontinuing the PSP.
64m for the 3DS sounds a bit low, but even if it sells 64m, and vita sells 17m, they'll outsell the Vita.
UPDATE 3.27pm: A new report suggests that Sony is ending support for PSP worldwide - not just in Japan.
European shipments of the PSP will also cease - albeit at some point later this year.
We're still waiting to hear back from Sony on details for the UK.
ORIGINAL STORY 11.45am: Sony will ship its last PlayStation Portable in Japan next month, the company has announced.
Can't find any sources, but I am sure they also stated that they don't plan on stopping shipping to asia (Not Japan) and south america until end of this year.