Takagi Estate is the home of Saya Takagi in Tokonosu City, and was the stronghold of Souichiro Takagi and his Ultra-Nationalist group during the outbreak.
The Takagi Estate is a location of the Highschool of the Dead(HOTD) series that was written by Daisuke Sato and illustrated by Shouji Sato. The series first began serialization in Fujimi Shobo's Monthly Dragon Age magazine in July 2006. It first appeared in Hightschool of the Dead Volume 3 CH. 10 "The Dead Way Home", and the anime appearance was in High School of the Dead - Episode 9 "The Sword and Dead". It's a prominent mansion within the fictional Japanese city of Tokonosu.