Why did LBP fail in Japan?

[Ouroboros24]

I don't know why.

I want to speculate, though. 

My number belief is the game has waned in new.  As much fun as NSMB2 is, it's been done.  For a platformer(mostly) its okay.  The physics in my opinion is too feathery.  Anyways, what's change in gameplay? 

Simple as that, it's been done.