Asakusa and Yoyogi are part of Tokyo LOL But kinda really far away from each other. Don't worry, I was super lost and scared before I went to Japan all by myself
But once I had a map with the subways, important places, etc I didn't get lost
EDIT: This is a very simplified map of Tokyo, Asakusa is in Taito and Yoyogi in Shibuya.
http://en.wikipedia.org/wiki/File:To...cial_Wards.png