Looking for title of mockumentary

[Maximilian M]

Dear Kinejapaners,

about one or two years ago I stumbled upon a trailer for what seemed to 
be a mockumentary or at least a feature film that had fake documentary 
elements in it.
It showed an english-speaking female reporter visiting a japanese family 
at their house and as her reporting progresses the family becomes more 
and more violent toward each other.

I'm pretty sure it was a direct-to-video release and is a 100% japanese 
production.
It must have been released around 2009/10.

Hope somebody knows the title!

Thanks,
Max