I will come up with a list sooner or later. In any case, the ones I mentioned earlier are the ones that I would place high on the list if the names are to be changed (e.g. Inaka, Shiro, Han... and Sensei, which I didn't mention last time)
Thank you. When DV sees this he will give his last word on it. I don't know if he will be for it or not. I have a hunch he will be ;)

Upon checking it, the entry is called "shogun_infantry_extralong_yari". There's only one unit (a DLC-based unit, in fact) that uses this warscape equipment theme.
Yep, this longest spear came with the DLC. You gave a good suggestion and let's see if DV will attach it to more units.

Another question that I should have asked is how moddable the campaign setup is.
I don't know actually but what I know is that DV won't change this starting setting. It would be too much work for him imho.