Remember a strange little car company called Daihatsu? Perhaps you know someone who drove a little econobox called the Charade or the Suzuki-Samurai-like Daihatsu Rocky SUV?

It's ok, we don't either.

But as it turns out, Daihatsu is a pretty big company in Japan (and is 51% owned by Toyota) and got that way by being one of the largest producers of small car and SUVs, including many of the ultra-cute and compact, JDM-only, kei cars.

At the 2011 Tokyo Motor Show, Daihatsu unveiled some of the weirdest concepts of the show, including the DX (D-cross) sports car we've already outlined -- a transformable compact car apparently inspired by Inspector Gadget.

But Daihatsu's strangest concept and perhaps the wildest of the show has to be the FC Sho Case. This Tasty-Bake oven on wheels has taken boxiness to another universe but it is quite stunning in person -- especially when the mechanical dance begins and all four of the super thin seats fold flat into the floor as the squared off steering wheel retracts flush into the dash.

As wild as the interior packaging may be, the most ground-breaking technology has been saved for the powertrain. FC stands for Fuel Cell, and in this case, the fuel is hydrazine hydrate (N2H4 H2O). Daihatsu claims this fuel has several benefits, including high energy density, low flammability at room temperature, and a similar fueling method to gasoline (which dramatically reduces infrastructure costs). Most importantly, Daihatsu claims hydrazine hydrate can be synthesized from nitrogen and hydrogen and emits no CO2 while powering the vehicle. Conveniently, precious little detail was provided on the downsides of this super fuel or the odds that a vehicle like FC Sho Case will ever come to market, but hey, that's why they call them concepts.