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I wonder how this trend extends to the cities. You obviously can't build a highrise expecting to knock it down 30 years later. Do they just accept preowned apartments?

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Some highrises are advertised as long-lasting, for example with "200 year concrete" and so on.[0] However, I think this is mostly marketing fluff -- if a company thinks they can make more money by tearing down a highrise and building a new one, they will not hesitate to do so, and often do. It seems that historically most highrises don't last longer than ~50 years. With new construction techniques and materials, maybe that will change.

Smaller apartments are even more ephemeral. The official service life for apartments according to the tax code[1] is only 20-40 years, depending on the construction material.

[0] https://hamatawa.com/lifespan/

[1] https://www.keisan.nta.go.jp/h30yokuaru/aoiroshinkoku/hitsuy...

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