Lifespan: Daiei 4 (1524) to 7/3 of Tenbun 18 (1549)
Title: Lieutenant of the Left Division of Outer Palace Guards
Lord: Ōuchi Yoshitaka
Father: Hiraga Okisada
Siblings: Takamune, Hirosuke, Nashiwa Kageyuki, Takayasu, sister (wife of Kagawa Motokage)
Hiraga Takamune served as a bushō during the Sengoku period. He was the head of the Hiraga clan who were kokujin, or provincial landowners, in Aki Province. His father was Hiraga Okisada.
In 1524, Takamune was born as the eldest son of Hiraga Okisada, a kokujin in Aki Province. According to family traditions, he received one of the characters in his name from his lord, Ōuchi Yoshitaka, the head of the Ōuchi clan, and adopted the name of Takamune.
After becoming the lord of Kashirazaki Castle, Takamune’s father, Okisada, came into conflict with Takamune’s grandfather, Hiraga Hiroyasu. Okisada supported the Amago clan while Hiroyasu supported the rival Ōuchi clan. Takamune, along with his younger brother, Shinkurō (later known as Hiraga Hirosuke), allied with their grandfather. This dispute escalated into armed conflict, and, in 1540, Mōri Motonari acted upon orders from Ōuchi Yoshitaka by intervening and toppling Kashirazaki Castle. Okisada entered the priesthood while Takamune inherited the headship of the clan.
In 1543, Yamana Tadaoki, the lord of Kannabe Castle in Bingo Province rebelled against the Ōuchi clan in an event known as the Battle of Kannabe. Takamune joined with other kokjujin under the command of the Ōuchi to subdue Tadaoki, but, on 7/3 of Tenbun 18 (1549), he died of illness while on deployment at the age of twenty-six. Through the intervention of Yoshitaka, the headship of the clan was inherited by Hiraga Takayasu who originated from a branch of the Kobayakawa clan.