This is the Nissan IDx Concept. It comes in two flavours as you go through these images. The beige-coloured version you see first is the IDx Freeflow, and the more aggressive, absolutely awesome-looking one is the IDx Nismo.
This pair is supposed to conjure the memory of the Datsun 510, but everything else is novel.
These plus the BladeGlider Concept… Nissan is on fire with the concepts this year ;)
From the 2013 Tokyo Motor Show
Photo credits (exterior only) and article: http://jalopnik.com/the-nissan-idx-nismo-concept-is-the-rebirth-of-the-god-1468159303
Photo credits (interior only): Nissan Motor Corp, Inc.