Joining and Welding Research Institute has proposed the concept of computational welding science as early as 1970's. It is one of the world pioneers in this field and has organized an international symposium on "Theoretical Prediction in Joining and Welding" in 1996. In further development of computational welding science, JWRI conducted a project on "Development of Highly Efficient and Reliable Welding Technology" which has been supported by the New Energy and Industrial Technology Development Organization (NEDO). One of the main objectives of this project is to establish a framework of the computational welding science which covers the entire aspects of welding, i.e. Welding Process, Welding Metallurgy and Welding Mechanics. This framework has been further developed with the rapid progress in the computer technology to meat various demands from the industry.
　Japanese industry is experiencing a drastic change since the last decade or so. Japanese manufacturing system, traditionally heavily dependent on skilled workers, is changing toward science and technology based production. This is due to the shortage of highly skilled workers. To realize this goal in the area of welding, the CCWS was established in 2007. Its mission is to conduct fundamental researches on computational welding science and to provide education to researches and engineers. In addition, as a leader of the computational welding science, the CCWS will develop and promote our welding simulation software JWRIAN.