Maat Mons, that's true, I hadn't realized that the description of the Shugenja class in the Oriental Adventures book actually do not mention any multiclassing restrictions, but I know my GM, he will argue that there is... And about the shadowlands, there is little info on both books, so we just are just using whatever rules we found. I couldn't find this mention of CHA penalty in the Rokugan book before, I'm going to look for it, I really appreciate your input!