I will follow the advice you guys given me , the fact the makers mark is fake deters me from proceeding any farther ( it does seem to be a quality steel and some real work went into making it, being a toolmaker I can appreciate that, fact that one of my best friends gave it to me and his dad brought it home, is more than enough reason to keep it, so no financial incentive ), I love the history of when and where it may have used or by who, I collect Lugers and Winchesters have for 35 years now, I have some lesser condition ones that I received from vets or family and have never touched so the sword will stay in that category as a historic weapon. I attached three more pictures of questions that were asked one for the shinogo and the other for Martin on the shinogi, I think these are the areas.
Regards,
George