Stephen -
I also currently have 3 Emura and 3 Nagamitsu (Bizen Ichiryushi)
plus a Seki Nagamitsu. Have had a dozen or so more pass
thru my hands over the years - several of which I wish now
I hadn't sold - (kick me, kick me!). Mostly very good blades,
but a lot of variation in quality of workmanship IMHO. I guess
due to some being by apprentices, prisoners taught by
Emura and/or helpers of Nagamitsu. As with all Nihonto, they
need to be judged individually.
Rich S