Nearing that phase of my life (55y) where I have to think about my old age. My genes seems good as my parents are still healthy and living in their own home at

Nearing that phase of my life (55y) where I have to think about my old age. My genes seems good as my parents are still healthy and living in their own home at the age of 83. It is expensive to get old - how do Japanese do it ???. Retirement homes or folks just living with their children like in some cultures ??.