SOKENDAI plays the central role in postgraduate education of KEK. The School of High Energy Accelerator Science consists of three departments, Accelerator Science, Material Structure Science, and Particle and Nuclear Physics. Research staff of the Accelerator Laboratory and the Applied Science Laboratory takes charge of the faculty of the Department of Accelerator Science. Students are gathered from variety of universities, technical colleges and companies, and there are many international students from Asian countries. They pursue their graduate research by taking advantage of the environment of KEK, one of the world’s leading institute of accelerator science.