Nihon Kogyo Co., Ltd.. The Group's principal activities are to manufacture and sell concrete and secondary concrete products. Civil engineering division includes fume pipes and walls. Public space division includes color paving materials, imitation trees, bricks, stone materials and street furniture used for environmental beautification. Exterior division includes color blocks, gates and stones for building exteriors. Civil engineering division accounted for 52% of fiscal 2002 revenues; public space division, 37% and exterior division, 11%.