Japan had this problem 30 years ago and had banks giving out multi-generational loans: https://money.cnn.com/magazines/fortune/fortune_archive/1990...

> build housing sufficient to meet demand

they also accept that in dense Tokyo metro areas, the sizes of places are tiny.

I dont think the Anglo way works - you cannot have both dense, but big apartments.

Sure you can. The issues with the Anglo way is that they've gone all the way to the other end with flat, wide buildings. Increasing verticality is a simple way to get more density without sacrificing area. At some point, yes, you'll just have to shrink down to get further density, but the low hanging fruit haven't been picked yet.

Building tall requires adequate public transportation and social infrastructure

Not just Anglos: Sweden, the Netherlands, France, Hong Kong, all have at least pockets of insane property prices.

Japan also doesn't have the problem of huge pension funds being able to influence and control housing markets in major metros. They don't exist because there isn't a need for them.