Shinichiro Tomonaga was a Japanese physicist born in 1906. He developed the theory of quantum electrodynamics (QED), which describes how charged particles interact with electromagnetic fields. Tomonaga's work "rescued the theory without making any radical innovations." He received the 1965 Nobel Prize in Physics, shared with Julian Schwinger and Richard P. Feynman, for their fundamental work in quantum electrodynamics and its consequences for elementary particle physics.