Huzihiro Araki

H. Araki has worked on quantum field theory, and together with R. Haag has stressed the idea of local observables in physics. His book, published by Oxford University Press, is worth buying. He has also made great progress in the theory of factors in von Neumann algebras, and has also some results on C*-algebras. For example, he (and D. E. Evans) has shown that one of the axioms for C*-algebras, traditionally used by mathematicians, is redundant, in that it follows from the remaining axioms. His contributions to statistical physics are also phenomenal.
He was the first president of IAMP and drew up its statutes.