Greetings!
I'm not a collector, but I do own a Katana (I think) signed by Ikkanshi Tadatsuna (I've been told). I've tried over the last 11 years to learn more about this sword; even had a scare from an exchange student that it may be a Kokuho (national treasure).
I believe the good folks in NMB will help me understand and learn more about this sword and look forward to any help/advice I may gain here.
I've realized that since the start of my research that these are much more than swords, they're wonderful works of art... masterpieces. I saw several collections when I lived in Japan and observed a 'return home' blessing of a lost sword. Cool stuff.
Will post pictures of my Katana in the appropriate board when allowed. Cheers to all!
San Sa Guthrie