The Hori clan was the greatest ally of the Niwa clan in Miyama Province in Kozakura in 1357 DR.
They were a branch of the Niwa and held posts of shugodai and shugo-matadai and many jito positions on the largest shoen in Miyama.
- ↑ David Cook (1986). Swords of the Daimyo (Province Book of Miyama). (TSR, Inc), p. 11. ISBN 0-88038-273-2.