[Fenrir]

I've been to many samurai expositions on museums, I train Kenjutsu, so, I always go to every Japan-related expo and I can say for sure that I have never seen a Samurai armor with nipples. Again, for an European armor it is more likely, but for a Samurai's armor, at least in my experience, there is no evidence of nipples in their armors, actually, the design of a samurai armor makes it impossible, but for the European style or is more likely to have them.