My brother is a graduate student at the University of Tokyo.

Bose-Einstein statistics is one of the important concepts in quantum mechanics.

He is known as an excellent theoretician.

He is immersed in the study of string theory.

Information theory is a field of study that mathematically analyzes the amount of information and the efficiency of its transmission.

He is particularly interested in string theory in physics.

He wrote a new paper on string theory.

String theory is a branch of physics that is a theory for understanding the basic structure of the universe.

He is particularly interested in game theory within economics.

He is writing a paper on coding theory.