*Excluding figures from Ishinomaki and Kesennuma medical care zone in Miyagi Prefecture and Fukushima Prefecture.
The survey was conducted at medical facilities on one designated date set for each institution from three days in October.
The number of patients refers to those who were continuously receiving medical treatment (including those who did not receive medical treatment at medical institutions on the dates of the survey) calculated by the following formula:
number of patients receiving medical treatment = estimated number of inpatients + estimated number of initial visit outpatients + (estimated number of return visit outpatients × average interval since last visit × adjustment factor (6/7))
Citation formats
Number of patients with Alzheimer's Japan 1996-2020, by gender
In 2020, around *** thousand male and 574female patients in Japan were treated for Alzheimer's disease. The overall patient number significantly increased in the past two decades and reached approximately *** thousand in 2020.
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MHLW (Japan). (June 30, 2022). Number of patients receiving treatments for Alzheimer's disease in Japan from 1996 to 2020, by gender (in 1,000s) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 30, 2026, from /statistics/1271388/japan-number-patients-alzheimer-by-gender/
MHLW (Japan). "Number of patients receiving treatments for Alzheimer's disease in Japan from 1996 to 2020, by gender (in 1,000s)." Chart. June 30, 2022. ÌÇÐÄÆƽâ°æ. Accessed July 30, 2026. /statistics/1271388/japan-number-patients-alzheimer-by-gender/
MHLW (Japan). (2022). Number of patients receiving treatments for Alzheimer's disease in Japan from 1996 to 2020, by gender (in 1,000s). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 30, 2026. /statistics/1271388/japan-number-patients-alzheimer-by-gender/
MHLW (Japan). "Number of Patients Receiving Treatments for Alzheimer's Disease in Japan from 1996 to 2020, by Gender (in 1,000s)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 30 Jun 2022, /statistics/1271388/japan-number-patients-alzheimer-by-gender/
MHLW (Japan), Number of patients receiving treatments for Alzheimer's disease in Japan from 1996 to 2020, by gender (in 1,000s) ÌÇÐÄÆƽâ°æ, /statistics/1271388/japan-number-patients-alzheimer-by-gender/ (last visited July 30, 2026)
Number of patients receiving treatments for Alzheimer's disease in Japan from 1996 to 2020, by gender (in 1,000s) [Graph], MHLW (Japan), June 30, 2022. [Online]. Available: /statistics/1271388/japan-number-patients-alzheimer-by-gender/
