Shuhei Yoshida @yosp mentions vgchartz!

[Ruler]

ZhugeEX said:

This is very misleading.

He does not quote any VGChartz data.

What he says is that Sony have not officially confirmed 4 million PlayStation Vita sales in Japan.
Media Create recently showed 4m+ sales in Japan.
VGChartz seems to have done this as well.

Yoshida is saying that Sony haven't announced it and so he's assuming that the interviewer must have used some public tracking service like VGChartz. If anything he is saying it in a way that makes VGChartz seem negative as he is just brushing it off as something the average person will go to and quote as fact. Because Sony never announced such a thing publicly. 

Hes downplaying it because he doesnt like how VGchartz is exposing accurate numbers to everybody without his permission