Edit: I said traditional and the thread is about modern, but OPs link is referring more to design than construction, very much uses traditional techniques with some variations to adapt it too modern tools. Good article.
Sure a building can be made to last a lot more than 30 years, provided you plan for it upfront with additional materials and architecture costs, and execute regular maintenance including on plumbing and potentially windows/door framing, which also have significant costs. All in all, considering Japan’s building constraints, the total budget for the house lasting 100 years will cost more than a standard house you scrap down and rebuild every 30 years.
Basically it’s the ship of Theseus’ paradigm: do you rebuilt a house piece by piece over time, or do full reboots at specific moments.
An illustration of this issue when looking at long term ownership of older houses:
https://cheaphousesjapan.com/buying-a-house-in-japan-advice/
> So why did I buy a newer house?
> I realized that an older, traditional house would be much more work and also more expensive and time consuming to maintain.