Charred Japanese cedar clads the exterior of this split-level house in Izumo, Japan, by Kanazawa studio Harunatsu-Arch. The architects chose to clad the exterior with charred Japanese cedar boards, giving the building a blackened textural surface that contrasts with the smooth concrete foundation slab.
http://www.dezeen.com/2014/10/22/harunatsu-arch-gui-house-japan/