As informatization industry has been developing, such theories as cryptography and information theory, communication theory, finance theory, and etc. have come to the fore as essential research areas. As the complexity of our society gets increased, the theories of a lot of fields such as pure science, applied science, and etc. accordingly get complicate and diverse, so that researches to explain these complicated and diverse phenomena on the foundation of pure theories are actively carried out over the entire world. In addition, it is the current trend of many advanced countries to make their endeavors to develop quantum communication which is next-generational computers and communication network, and quantum communication. This Institute purpose to develop pure theories which correspond to these academic tendencies and social demands, and to promote applied theories which can be applied to the actual business, so that the Institute contributes not only to the development of pure science but also to the training of top-rated research humanpower equipped with global research capability.