Dementia in Japan: my grandparents have dementia 1 (Current situation)

Dementia is a big concern in aging society like Japan. 

As I mentioned above, my grandparents have dementia. My grandmother already cannot understand who I am and my parents are, and my grandfather cannot live himself because of his problematic behaviour caused by dementia. 

In this article, I am going to write current situation of me and my family including grandparents. 

Situation: 

Me: a student. For some reason I came back to my parents house few weeks ago and will stay here for a while.I am taking care of my grandmother when she is at home (particularly during night and when my parents are out).  

My grandmother(age 90): nursing care level 2 (Probably she will be level 3 very soon) 

She moved to my parents house currently, and staying with us. Until moved in here, she and my grandfather lived in their tiny house together with a cat. 

My grandfather(age 90): nursing care level 2

We sent him into a nursing home currently. 

My mother: doing remote-base work, and working from our house now. She is the one who mainly taking care of her parents (my grandparents) and doing house work. 

My father: has not been working for a while, but doing part-time about 10h every week. He has gotten 3days outside work very recently and the work will start soon. Mainly he drives my mother and grandparents occasionally.  

My parents house: 3 bed rooms with bathroom, toilet room, kitchen and living room. I and my father are sleeping own rooms and my mother is now sleeping living room since my grandmother is sleeping in my mother's room (closest to toilet)

(*Since more than 10 years ago, my family has been having some functional problem like almost-Hikikomori father and low self-esteem mother, so this blogs might not be applicable for typical Japanese family cases. )