Contains 37 original articles on related topics of Micromechanics & Inhomogeneity which were presented to Toshio on the occasion of his 65th birthday. Contributors are from both the applied mechanics & materials communities, all with a common belief that micromechanics is an indispensable area of research. Selected topics include Atomic Spacing in Large Regular Cubic Lattices, Boundary Conditions at Interfaces & Elastic Solids with Microdefects.