Along with hinoki (Japanese cypress), cedar is one of the most accessible woods in satoyama. They are often seen planted near valleys and other moist areas. Cedar is light, soft, and easy to split, and it can be imagined that before the proliferation of machines, splitting cedar was much more efficient than cutting it with a saw. The wood split along the grain is shiny and durable because it does not break down the cells, making it difficult for water to penetrate, providing an excellent practical advantage. We are investigating the use of hegi technique, or woodspliting, which can be used without producing sawdust and without waste.