Tomizo Yoshida

was a prominent Japanese pathologist, famous for discovering the Yoshida sarcoma. In addition, he is known for demonstrating the chemical-induced hepatocarcinogenesis in rats with his mentor Takaoki Sasaki.

Yoshida received the Imperial Prize of the Japan Academy twice (1936 and 1953) as well as the Robert Koch Gold Medal (1963).

Contribution In the 1930s Yoshida and Sasaki showed the induction of liver cancer in rats by Ortho-Aminoazotoluene. Since that time, a large amount of data has confirmed the carcinogenic activity of Azo dyes.

In 1943, Yoshida found a cancer cell line, so-called Yoshida Sarcoma, and experimentally proved that cancer is generated from cancer cells. His findings opened the way of cancer research in terms of cells, and developed biomedical research on chemotherapy.

Biography Yoshida was born in Asakawa, Fukushima and graduated from the Medical School, Imperial University of Tokyo in 1927. He was an assistant professor of pathology at the same institution from 1927 to 1929. 1965 Elected Member of the Japan Academy. 1965 Elected Honorary Citizen of Asakawa At the annual award presentation held in Asakawa, Fukushima, winners receive one million yen and a diploma. Since its inception in 1975, the grants supported by the Japan National Committee, Union for International Cancer Control, have contributed to the development of the professional capacity of over 330 Fellows from over 40 countries.