JASFlAMT, I lived my early years on Yokota. The only reason I wear shoes in the house now is because after breaking my left foot multiple times; barefoot hurts. I was raised to run barefoot.
My brother's wife is originally from S. Korea and no one is allowed to wear shoes in their house. I think it's a great idea. I didn't own my home 3 days before some guy came in with his muddy boots and ruined my carpeting. And magically it was not covered under the warranty.
When I lived in Japan and went home on the weekends with the maid, she made me wash my feet before I entered her home. Never thought much about it. It was the rule. Plus, bare feet hanging down the brazier (?) was the best thing ever!
Live your life in such a way that when your feet hit the floor in the morning; the devil shudders...And yells OH #%*+! SHE'S AWAKE!