I haven't heard about this - but then again, American mainstream media is bad, and when it gets to foreign countries, its complete and utter propaganda. Canadian state-run media is certainly avoiding the topic also
Just floated, grant you.
The run on the banks was so intense that it was dropped like a hot potato and the people who floated the idea ran for cover like cockroaches.
To this day Japan's social security numbers are permitted to be used only for social security. Sort of like the system the USA had in the 1960s before the LBJ-Nixon administration started chipping away at our rights.