If I had to bet, probably classic Japanese incompetence with technology.
One of the most recent failures concerning MyNumber cards was government officials entering Person A's info for Person B's card while processing new registrations.
There have also been minor problems integrating the national health insurance and its associated patients' data with MyNumber; previously this data was handled and stored separately mostly in paper form.
To put it simply: There have been many bumps and rough edges that MyNumber has had to get through, many of them so basic in nature that most people unfamiliar with Japan's inner workings probably would find it mindblowing.
One of the most recent failures concerning MyNumber cards was government officials entering Person A's info for Person B's card while processing new registrations.
There have also been minor problems integrating the national health insurance and its associated patients' data with MyNumber; previously this data was handled and stored separately mostly in paper form.
To put it simply: There have been many bumps and rough edges that MyNumber has had to get through, many of them so basic in nature that most people unfamiliar with Japan's inner workings probably would find it mindblowing.