There are however other records which directly dispute this, with the Nihontô Meikan showing 50 different mei or signatures for Nagasone Kotetsu. Additionally, there are Honomi records of sword polishers and master appraisers receiving Mumei or unsigned blades from Nagasone Kotetsu, and adding signature to them later after having completely substantiated the maker and provenance of the sword in question, increasing this count even further.
There are however other documents that directly contradict this assertion, with the Nihontô Meikan presenting 50 different mei or signatures for Nagasone Kotetsu. Moreover, Honomi records indicate that sword polishers and master appraisers received Mumei or unsigned blades from Nagasone Kotetsu, to which they added their own signature later after confirming the maker and provenance of the sword.