Some concept cars are production-ready. The Toyota Setsuna Concept is not one of them. As much an art project as it is a viable production car, this two-seater resembles a boat, and not just in its shape. The majority of the vehicle is built using wood, with different types being used for the various parts — including Japanese cedar for the exterior panels and Japanese birch for the frame. It's powered by an electric motor, but details such as this are irrelevant when talking about a car that's assembled using a traditional Japanese joinery technique that forgoes nails and screws, and that has a 100-year meter inside to help gauge and appreciate the wood's aging process.