The development of environmentally friendly catalysts and materials for controlling air/water pollution and for protecting human health is urgently required in this century. This workshop should greatly contribute to exchanging new ideas and scientific technologies between two countries, China and Japan. The sixth workshop basically follows the concept of the previous workshop. The purpose of this workshop is to stimulate and foster discussion among leading researchers working on environmental catalysis and materials, and to point out the current problems in their research fields and suggest the future direction of development. Papers on the following topics regarding environmental catalysis and eco-materials are welcome;