Kenji Kosaka (小阪 憲司, Kosaka Kenji, 1939 – March 16, 2023) was a Japanese psychiatrist, known for his pioneer research on Dementia with Lewy bodies (DLB), which he first described.
[1] He was appointed a professor of psychiatry at Yokohama City University School of Medicine in 1991, before becoming a director of Yokohama City University Medical Center in 1995.
[2] Kosaka received the 2013 Asahi Prize for discovering Dementia with Lewy bodies.
[5] Two years later, he reported three autopsied cases of Dementia with Lewy bodies.
[6] The term Dementia with Lewy bodies was proposed at the first international workshop held in 1995, and is now in common use.