Yoichiro Nambu was a Japanese-American physicist known for his significant contributions to theoretical physics. Born on January 18, 1921, in Tokyo, Japan, he later moved to the United States, where he worked at institutions like the University of Chicago. Nambu is best known for his work on spontaneous symmetry breaking, which has important implications in particle physics and the Standard Model. In 2008, Nambu was awarded the Nobel Prize in Physics for his groundbreaking research. His theories helped explain how particles acquire mass and contributed to the understanding of fundamental forces in the universe. Nambu passed away on July 5, 2021, leaving a lasting legacy in the field of physics.