Masanori Ohya

is a Japanese mathematician.

After he received a Ph.D. in Mathematical Physics and Information Science and Dr.Sc., he continuously worked on operator algebra, quantum entropy, quantum information theory and bio-information. He achieved results in the fields of quantum information and mathematical physics. In particular, he proposed his version of quantum mutual entropy. Note this quantity is not the same as Holevo's chi quantity or coherent information, though each of them plays important role in quantum information theory. The information theoretic meaning of Ohya's quantum mutual information is still obscure.

He also proposed 'Information Dynamics' and 'Adaptive Dynamics', which he applied to the study of chaos theory, quantum information and biosciences as related fields. Provided by Wikipedia