Dementia Care-assist AI system which predicts and prevents BPSD

What’s DeCaAI

DeCaAI is an abbreviation of “Dementia Care-assist AI system”. Development of the system is a 3-year project from 2019 to 2022, financially supported by the Japan Agency for Medical Research and Development (AMED). The project was executed by following institutions: Tokyo Center for Dementia Care Research and Practices as a representative; Senior Dementia Institute as a co-representative; University of Electro-Communications; and so on.

How DeCaAI works?

From medical and nursing care facilities (including home),

  • Vital data of the person with dementia (pulse, body movement, etc.)
  • Environmental data (room temperature, moisture, illuminance, etc.)
  • The care record entered by the caregivers

are collected to cloud computer via internet communication link.

Analyzing these data using AI,

1) DeCaAI predicts BPSD* 30 min and 60 min in advance 

2) DeCaAI notifies BPSD with appropriate preventive care to on-site caregivers.

These prevent the occurrence of BPSD, and reduce severity of it, when it occurs, through notification of appropriate care to caregivers.

* BPSD, which is a medical term, is an abbreviation of “behavioral and psychological symptoms of dementia”. This includes irritability, verbal abuse, repetitive behavior, delusions, hallucinations, depression, and anxiety. From the caregiver’s point of view, it is a symptom. But BPSD can also be seen as a sign that the person’s heart is expressed in their words and actions.  

Utilization of DeCaAI ① AI Prediction of BPSD- Feedback of Preventive Care to Nursing Care Site

Examples of notification on mobile devices (tablets and smartphones)

Utilization of DeCaAI ② Voice input when BPSD occurs- Care record with automatic classification of sentences into F-SOAIP

Example of voice input chat screen and record confirmation screen

What is need to the DeCaAI?

*The current BPSD prediction accuracy is about 80% in favorable conditions. We should further improve the system, so that it gets “good” evaluation form users (caregivers).

*If the BPSD predictions is too frequent, the preventive care may become a burden on caregivers.

*Even if BPSD can be prevented by the preventive care, it may be difficult to get a sense of accomplishment, because of no show of the BPSD. There is no way to know whether the DeCaAI’s prediction is correct or incorrect.

*In order to acquire vital data (pulse, body movement, etc.), person with dementia should wear a wristwatch-type sensor device.

*Appropriate internet link environment (speed and security) should be provided to transmit safely large amounts of data to the cloud computer in real time. *Currently, we are discussing with care record software vendors and other companies for social implementation of the DeCaAI in 2023. For that, it is necessary to calculate costs of sensors, tablets, hearable devices, Wi-Fi equipment and system usage fees.

Project Secretariat: Tokyo Center for Dementia Care Research and Practices

1-12-1 Takaido-Nishi, Suginami-ku, Tokyo 168-0071, Japan

Tel: 03-3334-2173, E-mail:            

Senior Dementia Institute

20-14-4F Chigasaki chuo,

Tsuzuki-ku, Yokohama, Kanagawa                        


Contents are based on data at December, 2022. This document can be obtained at DCnet,

Senior Dementia Institute

〒224-0032 神奈川県横浜市都筑区茅ケ崎中央20−14 松本ビルB館 4F
TEL:045-949-0201 FAX:045-949-0221
Copyright © 2018 Senior Dementia Institute. All Rights Reserved.