Yeah I'm aware of that distinction... Meant that I've read that many kanbun smiths take their roots from bizen traditions - wavy hamon, low shinogi etc... So initially thinking that it was bizen and muromachi was mostly a "dating" miscue if that makes any sense. Had it been older, it most certainly would be reasonable to think bizen and muromachi. The shallow pictured sori does point to the kanbun era, however as you've said earlier pictures can be misleading...its not as shallow in reality as the pics suggest. I own another sword, a katana. I'll post pics of that soon, but my neophyte opinion would be shinto and hizen...i'm sure i'll get a more suitable opinion from the very knowledgable people on this forum..thanks.