| Kenji Kosaka | |
| Native Name: | 小阪 憲司 |
| Native Name Lang: | ja |
| Birth Place: | Ise, Mie, Japan |
| Nationality: | Japanese |
| Field: | Psychiatry Neuroscience |
| Work Institutions: | Yokohama City University |
| Alma Mater: | Kanazawa University |
| Known For: | Dementia with Lewy bodies |
| Prizes: | Asahi Prize (2013) |
was a Japanese psychiatrist, known for his pioneer research on Dementia with Lewy bodies (DLB), which he first described.[1]
Kosaka was born in Ise, Mie, and completed his M.D. in 1965 from Kanazawa University.[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.[1] He was a director of Medical Care Court Clinic in Yokohama since 2011.[2]
Kosaka received the 2013 Asahi Prize for discovering Dementia with Lewy bodies.[3]
Kosaka died from aspiration pneumonia on March 16, 2023, at the age of 83.[4]
In 1976, Kosaka described the concept of Dementia with Lewy bodies for the first time.[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.[7]