Conway has got it, and with good advice on the oil. I use camellia oil also.
It’s listed as “Type 19 Company Grade Cavalry Officer’s Dress Sword” in Dawson’s in chapter 8 page 104. Dawson states at the chapters beginning that on July 6th 1886 this sword was introduced exclusively for cavelry officers; and was a modification of the Type 8 riding sword for officers. *
* Dawson, Jim. Swords of Imperial Japan, 1868–1945. Cyclopedia ed. Newnan, Ga.: Stenger-Scott Publishing, 2007.
The chapter shows a few different blade types for this style of sword, even a German blade example. I imagine this is one of Suya Shoten’s blade profile options?
Best,
-Sam