Kantei by photos is very difficult, it is hard to get a "feel" for weight of the blade etc. At first look i thought the shape looked early Shinto, but the Hi extend into the nakago (probably would end near the machi if ubu) and the temper continues past the machi: so i guess it may be suriage. If suriage the shape could be very late Kamakura or early to mid Nambukcho. The temper/hada look interesting, lots of nie and activity so maybe Soshu or related. The hada looks like it has patterns i would assosiate with Etchu Norishige or Hasabe. I do not think i have ever seen this sword in hand, i do not remember seeing it in pictures, but i do recall you had a Hasabe katana on your website, So i hope it is not cheating but as i know you had one that would affect my guess. So i guess Hasabe, if not then another early 14th century Shoshu maker. If more of the nakago were shown and it looked ubu then i would say a skilled Shinto smith copying Soshu.
I look forward to learning from my mistakes when the answer is posted, anyone is welcome to "have at" my answer - it is all educational.
Mark Jones