Ian,
Thanks for that. I'll check into that family.
Yes, your right. The 6 coin mon is the one used by the Sanada clan. The leaf mon is the one that's killing me.
I believe that is was dictated that lower ranking soldiers were required to have only simple furnishings on a katana. The kashira was expected to be plain or possibly a simple grain pattern if I recall. The fuchi was also relatively plain with only the kamon of the clan they were fighting under. It was howerver accepted the on the reverse side that soldiers own family crest could also be displayed. That could result in two different crests with no other connection other than that they were all playing for the same team. Please correct me if I'm wrong.