For over 40 years Tsukamoto Yoshifusa has used scrap wood from old Japanese houses to make violins. Carefully carving the front and back plates using self-taught techniques, each one takes nearly a year to complete. So far, he's made 45. He says old wood is ideal. The older the drier. The denser the grain, the richer the sound. His family also loves to play his scrap wood violins. The "joy of wood" helps keep them in harmony.