Here are some low ranking samurai scum. The foot soldiers you see in the movies who wear no clothes under their armor, except maybe a fig leaf.
I have more in mind and will append the thread as I come up with them.
I defend the tan skinned guy because a lot of Japanese can be quite swarthy--especially when dirty and sun-baked. The photo inspiration was the samurai in the lower left corner of the Li Poknam photo (re-posted below). But I see these guys a lot in the classic samurai movies.

Fighting Li Poknam (backdrop--a burning Korean fortress!)
NOTE: I'm trying to spruce up Li Poknam. I painted his coif red and may add the fur trimmings...

Original source (lower left corner; the swarthy, shirtless guy in armor):
