What "number" design should be - In response to the pension number leak incident

In the pension number leak incident, it seems that "all leaked numbers will be changed." Personally, I feel like "Oh no." As I wrote in yesterday's article, if it is operated properly, the leak of the number itself is not a big risk, and since the address, name, and other information that was leaked along with it cannot be changed, there is little point in changing only the pension number...

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Is it dangerous if the number is leaked?

Well, how are you all doing as we approach the summer of the My Number bubble? It just so happens that pension numbers have been leaked in large numbers, and it's been said that this could have an impact on My Numbers, but in the first place, why would anyone make such a fuss about a "number" being leaked more than other personal information such as "address, name, date of birth"...

Further display Is it dangerous if the number is leaked?