Ahead of landfall, the insurer sent 48.99 million warnings through its Eagle Eye platform, inspected 2,458 flood-prone sites and helped move more than 2,770 vehicles out of harm's way.
Reinsurance and cat bond cover will limit the earnings hit, but the agency said semiconductor-driven industry clusters could push net losses above 2016's.
Advantage is shifting from insurers competing on price to those combining agricultural expertise, analytics and flexible capital, says Swiss Re's Chandan Verma.
Estimates from across the broker and ILS market point the same way, with losses expected to fall short of the quakes that struck the same prefecture a decade ago.