I know what gimei is. It’s a false signature. In most cases a big name swordsmith on an average sword to bump up the value. That is not what I am asking. And I am in no way arguing if this signature is legitimate, I am not a professional in any way on the subject. I would think that a sword with a cutting edge of 30” is quite a accomplishment to craft that whoever forged this sword would have been proud enough of their work to put their name on it.