Based on a conversation I and Fortune Maiden were having. Seriously, this has to be the answer.
Night had fallen over Kai, even the most dedicated soldier finding his bed and falling into it. The full moon shone brightly overhead, illuminating one ninja's patrol path.
Sasuke looked from right to left, asserting that there was no threat to come, and when the night guard turned up, gladly handed his post over. Problem was, the shinobi wasn't tired yet. Lord Shingen had sent him on a mission the day before, and by the time he got back, breakfast was starting. "It's tough being a ninja." He sighed, turning the corner into the main courtyard.
As he looked up, the repairmen who were supposed to be fixing up the latest hole in the floor (how Yukimura learnt anything from being punched in the face several times and through walls continued to elude him) stared back, nervously looking around.
Only, instead of actual, y'know tools, they were carrying a large screen, painted to look just like the floor. "So that's how you get the repairs done so fast." The ninja smirked, everything clicking into place. "And why Danna just seems to shrug it off every time."
"Please don't tell Lord Shingen, who knows what he'll do?" The head worker begged, even as his lackeys took the screen inside.
"Don't worry, I won't." Nodding, the worker, went in to help, whilst Sasuke went on his way. "As for what he'd do, he'd probably just throw Yukimura into everything to see what was real and what wasn't."
The next day...
"Yukimura!"
"Your Lordship!"
"Yukimura!"
"Your Lordship!"
"YUKIMURA!"
"YOUR LORDSHIP!"
Honestly, you could almost hear the screen makers and repair staff sobbing.