Japanese houses usually lasts at least 40 years unless serious disaster (not earthquake, but like heavy typhoon or tsunami), maybe over 60 years if properly mai

Japanese houses usually lasts at least 40 years unless serious disaster (not earthquake, but like heavy typhoon or tsunami), maybe over 60 years if properly maintenanced. Any house won't last 20 years must be blamed. But just people may don't want to live in 40 years used old house but want only the land.