-
I think that used to be the case, especially with the number of earthquakes, people generally prefer something new and shiny, but I know people who bought older houses and they are still very robust. One thing here is they build for the summer rather than the winter so they can be quite drafty and cool in the winter, no central heating or double glazing as standard either unless you're in Hokkaido.
Only anecdotal, but aren't most buildings quite poor quality? Which I understood was part of the reason people knock down and rebuild.