Hi Steve,
I'm pretty much a newbie too so take this with as much salt as necessary. Though I bit unclear for my inexperienced eyes, I would agree that the mei in the picture reads Geishu (no) ju Fujiwara Fuyuhiro. If that is the case then it may or may not be the smith mentioned in John Stuart's post.
According to Hawley's, there were a number of smiths of this name working in Aki (Geishu) between 1593 and 1864 but there was only one smith signing using "Fujiwara" as above and he worked in the period 1661 - 1675. This smith gets a ranking of 15 points. If you are able to post pictures of the blade itself you might well get some confirmation or rejection of this view as the sugata for the period around Kanbun when this guy worked is likely to be different from that of Tensho.
I hope that this helps but if you hang on you might well get a more educated view in a while.
Kind regards,
John Johnson