"In a culture obsessed with newness" It's mostly because of earthquakes, they got used to buildings being temporary. Also sismic regulations are constantly evolving, so newer is safer (because more resistant to earthquake thanks to modern technics) and after some time it's more effective to destroy a building than do the necessary (and mandatory) work to keep up with the regulations. So no, the Japanese don't want ne…
I have a completely different understanding of this. Buying a house, the carpets, the drapes, all have to be replaced. Because of a taboo against using things soiled by other people. No amount of cleaning can get them clean enough to overcome a taboo. Same with cars. There is apparently little/no used car market in Japan. Lots of our (USA) spare parts for economy cars come over on ships from Japan. Because, no market…
You also rarely see old cars on the road because (my understanding is) that taxes incentivize people to ditch old cars quickly and get new ones.
My thinking is this extends through various parts of Japanese society, and combined with various taboos, is used by the government to help keep the economy moving. Otherwise, the culturally thrifty Japanese population would just keep everything they have forever and the economy would be in worse shape than it is now.