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It's not.

Tamahagane itself is highly controlled. The name is not. I got this confirmed by So Yamashita. Just like in the west, it has been used as nothing more than a marketing name, like Silver...

Probably. Or they have very good connections. Either way what they do is legal or they wouldn't be doing it in public.



Tamahagane was the only way to produce decent steel until they started...

Afaik they didn't ban swords, but the public wearing of swords. I would doubt many fmaily swords were turned into something else. Reusing the steel is usually only done with broken swords.

The tamahagane ones?
Because those are pretty expensive, tamahagane being more expensive than gold.