Wow, really close then! I wonder why enemy Geishas never bothered me when campaining...

Hm, this would be quite undesirable. The AI wil probably be unable to fight off 5000 men. I bet you would. This could become a massive drawback then. Are there other posibilites to come out of this? reinstall and save the savegame? Or transfer it to another PC with Shogun, fight it there? Or ingame stuff: counterattacks or anything?