Abstract
A new approach to materials' innovation of substitution of rare elements by common elements is discussed. The importance of the innovation of substitution is insisted from the viewpoint of increasing materials' supply risk. A national project named "Elements Science & Technology" is mentioned to start efforts to sustainable use of resources. While "reduce", "recycle", "substitution" and "restriction" are keywords in the project, fundamental substitution is expected with great interest. For the fundamental substitution, a new concept named "Lattice Engineering" is introduced. Family concepts of lattice engineering, namely, meta-metallurgy, instructed inter-atom infrastructure and nano-alchemy are also introduced.
