No, Chris.
In this case, considering the time of manufacture, only the hacho (cutting edge).
In old times, Heian, Kamakura, tachi could have several sori, one in the nakago, one on the blade...
This type of blade is typical of Muromachi. At this time, 16th century, there were a lot of hira zukuri wakizashi. In the same way, at the hinge of Nambokucho/Muromachi, some smiths forged hirazukuri katana/tachi with blades around 65 cm. I have seen some Bizen blades like this.
If you want to speed your research, the easiest way is to google « hira zukuri wakizashi » and you will see blades and in the des ription, the Province. The key kantei points here are « hira zukuri wakizashi », nakago jiri.
Edit to add, in those times, one could say that Bizen accounted for 50% pf the blades producet and Mino for 25%.