Best guess at a mei?

[Spartancrest]

I have had this guard for some time but not bothered to see what can be made of the very faint mei, It is so worn and thin this is the best image I could get. Any rough ideas?

 

I believe there was a rat or mouse inlay at one time - that has gone, I can't see any cut down marks but I have seen a very similar piece with a rim.

[Manuel Coden]

i read 一風子 (Ippushi? child of Ippu?) can't find any artist with that name, the only similar is 一風 "Ippu"

[Spartancrest]

Thanks Manuel, it is a hard one with so much missing.

[SteveM]

一風子 (Ippūshi) is the gō of an artist named Yoshioka. Wakayama mentions two Yoshioka artists, but only gives detailed information on one of them, and the information he provides doesn't really match with the tsuba above. I looked around on the web for other examples of 一風子 but I couldn't find anything.