Tsuyoshi Nishiguchi is a visiting researcher at Gen Shinozaki Laboratory, Psychiatry and Behavioral Sciences of Stanford University. His work mainly focuses on the pathology and treatment of delirium with animal experiments using the bispectral EEG method. As background, in Japan, he did Ph.D. in medical sciences about depression study with animal experiments and has been a psychiatrist for eight years, working at the Department of Psychiatry of Tottori University Hospital and a city hospital.