We have national holidays in this week. Yesterday is Respect-for-the-Aged Day. (敬老の日) We recognized yesterday there are a lot of old people in Japan.
There are some reasons that prolong our life. However I think that the biggest reason is medical treatment progress and we can live longer. In Japan 60 years old is very important age. When people get 60 years old, we celebrate the longevity as Kanreki. (還暦). But now 60 year old in Japan is very young and seventy or eighty years old is not unusual. These people are very powerful and have a lot of energy.
We need respect old people who work hard after the war and contribute to our modern society.
There is some cerebration year for longevity in Japan.
60 year old for Kanreki (還暦)
70 years old for Koki (古希)
77 years old for Kiju (喜寿)
88 years old for Beiju (米寿)
90 years old for Sotsuju (卒寿)