Okay, for some reason I couldn’t tell if they were Japanese of kings. I agree with nabiki about laying, crowing, mounting or vent sexing and also with raven lover about that cute little double blue face. I’m jealous!
I was going to say they aren't feather sexable colours, but the first three might be. They are cinnamon tuxes, so they would probably show blue and red feathers if they were males. If they don't, I think that means they are females.