I picked up "Plum Rains" because the premise interested me: a near-future Japan where longevity is rising, fertility is falling and the Japanese, dependent on immigrants for many personal services, start to introduce AI-driven robots that grow and learn as they interact with their owners.
I'd imagined a clever SF exploration of the ethics of AI and the relationship between server and served.
I got all of that but I'm also getting a very human tale about the youth of a woman reaching one hundred who is now a respected Tokyo matron but started as a mixed-race aboriginal on Taiwan and about a Filipino nurse, alone in Japan, trying to work off her debt.
The added dimension in "Plum Rains" is that the point of view is Asian rather than European.
This is not a fast read but it is a rewarding one.