Mitsuo Tasumi (January 23, 1937 – November 24, 2021) was a Japanese physical chemist known for his vibrational spectroscopic works on synthetic and biological macromolecules. He was Professor Emeritus of the University of Tokyo, and a former president of Saitama University, having traineda number of physical chemists active in academia and industry. , a zoologist at Kyoto University, was his brother.