Thanks!
I posted some more pic´s in another thread (I did´n find out howe to do it in a reply in this one..).
About the smith Kanenori, I looked in the Nihonto Club swordsmith index, and and for the era in question (16th - 17th century) there were about 60 guys with a similar signature in Kanji.
If we can narrow it down to the Mino province, and if it is a smith active in the 17th century (Shinto?) there are just 4 guys (at a quick glance).
If this is correct, is it in any way possible to tell who the smith may have been?
For me, this is very fascinating, that I in front of me have a sword that was made so long ago
I´d like to know more exact when it was made though.