Monster Hunter 4 at 2 million copies sold in Japan in just 4 days!

[anonymunchy]

The vgchartz front page article states that the series has now passed 25 million total sales since its 2004 release.
That number is at 21.21 million without MH4 numbers included.
Was this series under tracked or does that mean 3.8 million sales? I could also be looking at something wrong :P