Tomonaga Sin'ichirō was a Theoretical physicist of the Showa period.
Tomonaga Sin'ichirō was born in Tikyo on 31 March 1906.
In 1929 graduated from Kyoto University. In 1932 he entered the Institute of Physical and Chemical Research, studying under Nishina Yoshio, and later went to Germany, where he studied under Werner Carl Heisenberg.
In 1941 he became a professor of the Tokyo University of Science and Literature, later known as the Tokyo University of Education.
From 1956 to 1962 he acted as president of the Tokyo University of Education and from 1963 to 1969 as head of the Science Council of Japan.
In 1948 he received a Japan Academy prize, in 1952 a Cultural Award, and in 1965 the Nobel Prize in physics.