Hi I just wanted to throw in my two cents and say that ichihara nagamitsu imho created bizen style nicely and not so flamboant, however not lacking on the essentials,sugata,hada,hamon,hataraki ect...Also id like to add that I have a ichihara nagamitsu that looks like in the picture but with a juzuba midare with choji based on suguha hamon,with sumegane,ashi and bo utsuri.anyways nice pic again! its nice to see more high quality nagamitsu blades popping up and showing people the true quality of his blades and shows consistent works in Bizen tradition.Idk if that helps you however it can atleast remind you of a treasure you have! And it makes me think that maybe you should look at koto or maybe shinto blades in Bizen tradition.
Regards
od fimor thought