The blade possess the following features, and (translated) statements; by the tester "Yoshisada". The personification of the blade by giving it the name, Fujimi; indicates that its abilities are "IMMORTAL", and can never be lost (never die). "Hairu", means that this has been embodied into the blade. It is believed in the Japanese Culture that many Japanese Swords have their own spirit. It is very well known amongst many collectors that some have experienced this "IMMORTAL LIFE" almost to a sense where they could feel the hairs on their neck raise up - as if the spirit of the Japanese Sword is actually present.
To encounter a (Tameshigiri or Saidan) blade with these attributes (especially as stated by the sword tester) is one of the rarest occurrences in the realm of the Japanese Sword.