Kenji Kosaka (psychiatrist)
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Kenji Kosaka Psychiatrist
Kenji Kosaka
Alma materKanazawa University
Known forDementia with Lewy bodies
AwardsAsahi Prize (2013)
Scientific career
InstitutionsYokohama City University

Kenji Kosaka ( , Kosaka Kenji, born 1939) is 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 as 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 has been a director of Medical Care Court Clinic in Yokohama since 2011.[2]

He received the 2013 Asahi Prize for discovering Dementia with Lewy bodies.[3]


In 1976, Kosaka described the concept of Dementia with Lewy bodies for the first time.[4] Two years later, he reported three autopsied cases of Dementia with Lewy bodies.[5]

The term Dementia with Lewy bodies was proposed at the first international workshop held in 1995, and is now in common use.[6]


  1. ^ a b c [Professor Emeritus Kosaka] (in Japanese). Ashitaba Mental Clinic. Retrieved 2014.
  2. ^ [Medical Care Court Clinic] (in Japanese). Medical Care Court Clinic. Retrieved 2014.
  3. ^ "The Asahi Prize". Retrieved 2014.
  4. ^ Kosaka K, Oyanagi S, Matsushita M, Hori A (1976). "Presenile dementia with Alzheimer-, Pick- and Lewy-body changes". Acta Neuropathol. 36 (3): 221-233. doi:10.1007/bf00685366. PMID 188300.
  5. ^ Kosaka K. (1978). "Lewy bodies in cerebral cortex, report of three cases". Acta Neuropathol. 42 (2): 127-134. doi:10.1007/bf00690978. PMID 654884.
  6. ^ [Japanese Society for Dementia with Lewy bodies] (in Japanese). Retrieved 2014.

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