I have always been puzzled by the house market in Japan too.
That podcast is really interesting.
The points raised as in it as explanations for the knocking down of houses (more than half before they are 38 years old) and building new ones on the same land are:
1. A cultural thing, going back to the
Shinto traditions of new things being clean and pure.
2. The Japanese simply prefering new things - new TV every 3 years, new car every 5 years, new house every 20 years!
3. Fear of earthquakes and other natural disasters leading to almost no maintenance on the houses after they are built.
4. The improvement of building regulations to meet anti - earthquake standards.
5. The government led drive to keep the construction industry churning over.
It's still puzzling if you ask me, particularly when you see the superb build quality of new houses going up there today, compared to 20 or 30 years ago.
Two of my nieces have built new houses in Japan in the last couple of years and they would not even consider buying a 'used' home!!
I think most Japanese simply don't consider the residential property market as an investment as we do in a lot of other countries ... they simply look at a mortgage being cheaper than renting with the J Banks generous interest rates.