Japanese block print or painting.... Signature?

Picked up this old Japanese print at a local auction this week. It was sold as a painting and, upon examination, it appears to be a print with watercolor enhancement. It is very similar to the work of Ohara Koson (1877-1945) but the signature does not match. I believe this dates to the early 20th century, so contemporary to him. Any ideas or anyone who can read the signature? There is a notation on the back of the base paper but it probably only relates to the framing (last pic).







As you can see, this is a bit rough. The artwork was glued to a piece of black construction-type paper that only showed about 1/8" around the work. This, in-turn, was glued to the backing paper. I was able to remove the backing paper completely. In removing the black paper, some remained where it was glued across the top. I have shaved this down a bit with a razor blade so that is is fairly smooth. Not sure if I should do anything more with this or not. Ideas?

The artwork itself is in reasonably good shape. There is some staining along the bottom. There are a few minor foxing spots. There is some overall toning as well. I am not versed in paper conservation so hate to tackle this on my own. I only paid $35.00 for this so doubt worth having professionally conserved. My inclination is to do nothing but am open to suggestions.

Assuming I do nothing more, I intend to try and flatten this a bit and have it matted. Should I have this hinged and matted traditionally? If so, I will lose a bit of the margins. The other option would be to have it mounted as it was originally, and mat around it. Recommendations?

 

This may help with the writing on the back.

 

Bumping this up. Any thoughts? No Japanese translators?