Yeah! You can see it in some of the game lines, like Hasebe in part 22 (http://touken-ranbu.wikia.com/wiki/Recollections/Part_21_-_Part_30). The production staff for Hanamaru uses the term too. (https://twitter.com/touken_hanamaru/status/713586727529525249)

It's neat to get some more info on what they are either way though, and them being both would be a neat twist imo.