Toshihide Maskawa earns his Ph.D. in particle physics. He attends seminars on field theory as a compulsory subject for a year. Thanks to this, he becomes interested in theoretical problems related to weak interactions. In 1964 he enters the laboratory of Professor Sakata and begins his research in particle physics.

Toshihide Maskawa enters Nagoya University. His first class here is mathematical analysis. He takes part in the DEPHIO student group, whose aim is to become good science researchers helping one another. In this period he is also politically engaged, motivated by his sense of justice.

Toshihide Maskawa is appointed Associate Professor at Nagoya University.

Toshihide Maskawa joins the faculty of Physics of the Kyoto University. In 1976 he becomes Professor of the Yukawa Institute for Theoretical Physics at Kyoto University and from 1997 to 2003 he is its Director. In 2003 he is appointed Emeritus Professor. In the 1970s, Maskawa collaborates with Makoto Kobayashi on explaining the broken symmetry of charge conjugation C and parity P in the weak interaction.

Toshihide Maskawa is born in Nagoya. Since an early age he develops an interest for books and science. Initially he buys mystery stories and novels, then he gradually starts buying more mathematics books. The first is "Theory of Functions" published as a volume in "New Mathematics Series" by Baifu-kan. After the Soviet Union successfully launches Sputnik I, he begins calculating the orbits of satellites and rockets by using a slide rule and an abacus.

Toshihide Maskawa and Kobayashi propose that CP violation is an inherent property of the standard model of elementary particles if there are at least two additional quarks beyond the four “flavours” (up, down, charm, and strange) postulated at that time. These two new quark flavours are experimentally confirmed in 1977 (bottom quark) and 1995 (top quark).

Toshihide Maskawa is appointed Special Professor and Director General of Kobayashi-Maskawa Institute for the Origin of Particles and the Universe at Nagoya University.

Toshihide Maskawa receives one fourth of the Nobel Prize in Physics along with Makoto Kobayashi "for the discovery of the origin of the broken symmetry which predicts the existence of at least three families of quarks in nature". The other half of the Nobel Prize is awarded to Yoichiro Nambu.

Toshihide Maskawa is appointed Director of Maskawa Institute for Science and Culture at Kyoto Sangyo University.