About the ito wrapping, I noticed that all the tsuka posted here have the criss-cross pattern just over the menuki done in the kai gunto style.
It would seem an hallmark of this maker.
Hi Bryce;
no, the habaki hasn't any stamp. It's a siver-foiled one, and I think is older than koshirae.
The blade is actually pretty old: a mumei Uda that I will post soon.
Hi all;
I resurrect this aged post because (thanks to Steve) I stumbled across this very same maker's signature on my 98 koshirae. Also some features are superimposable (i.e. silver push button/chuso). Only difference is that the numbers on metal parts are in western style.
Hope this would add something.