Omg, she doesn't has dementia, she has a severe depression. I've had depression last 10 years past, and depression affects our memory and cognition after a while. I feel really sorry for her. 😔 She needs vitamins and suplements to get her physical and mental health back. Thank you for sharing this story, knowing so many cases of depression and home disorders in Japan helps us to understand how important is to preserve and take care of our mental health. Please don't forget do allow english subtitles for us - KZbin delivers terrible translations at the subtitles. Lots of love from Brazil 💛💚