Lifespan: Tenbun 1 (1532) to Genki 1 (1570)
Other Names: Nagakatsu
Father: Bessho Nariharu
Siblings: Yasuharu, Yoshichika, Shigemune, sister (wife of Ogō Sadanori)
Children: Nagaharu, Tomoyuki, Harusada
Bessho Yasuharu served as a bushō and head of the Bessho clan in eastern Harima Province.
In 1556, Yasuharu inherited the clan from his father, Bessho Nariharu. Similar to Nariharu, Yasuharu exhibited military prowess, repelling attacks by the Miyoshi and expanding the influence of the Bessho in eastern Harima.
In 1559, Yasuharu burned down the Hioka Shrine in Ōno in the Kako District of Harima. This conflict resulted in the deaths of the two older brothers of Takenomori Tsugusada.
When Akamatsu Yoshisuke engaged in battle against his son, Akamatsu Norifusa, Yasuharu offered protection to Yoshisuke at his base at Miki Castle. He supported the march by Oda Nobunaga upon Kyōto by dispatching his younger brother, Bessho Shigemune, to fight against the Miyoshi clan. Yasuharu provided support after Ashikaga Yoshiaki, the fifteenth shōgun of the Muromachi bakufu, incurred an attack by the Miyoshi sanninshū, or Miyoshi Group of Three, for which he received a written commendation from Nobunaga.