Lifespan: 14xx to Kyōroku 3 (1530)
Title: Master of Imperial Guards of the Left Division
Lord: Rokkaku Takayori → Rokkaku Sadayori
Father: Gamō Sadahide
Siblings: Hideyuki, Takasato, Otowa Hidenobu, sister (wife of Ogura Hyōgo-no-suke)
Wife: Daughter of the Aoki clan
Children: Sadahide, Takakiyo, Katahiro, Hidehiro, Aoki 梵純, daughter (wife of Gamō Hidenori)
Gamō Takasato served as a bushō during the Sengoku peirod. He was a retainer of the Rokkaku clan – the sengoku daimyō of southern Ōmi Province.
Takasato was born as the second son of Gamō Sadahide, the fourteenth head of the Gamō clan, a kokujin, or landowner, of southern Ōmi.
Upon the wishes of Sadahide, Takasato separated from the family and served Rokkaku Takayori. Although Takasato had a degree of separation from the main branch of the Gamō family, he came under the complete command of the Rokkaku and received one of the characters in his name from Takayori, adopting the name of Takasato.
In 1513, upon the death of Gamō Hideyuki (Taksasato’s older brother who had inherited the main branch of the Gamō family), Takasato sought to succeed him, but, upon the wishes of Sadahide, Hideyuki’s eldest son, Gamō Hidenori, was named the successor.
Takasato arranged for this daughter to wed Hidenori and ostensibly maintained friendly relations with him. Nevertheless, Takasato was resentful over the allocation of territory so, in the seventh month of 1522, he rebelled with the support of Rokkaku Sadayori, laying siege to Hidenori at Otowa Castle.
Hidenori made strenuous efforts to defend the castle; but, without the prospect of reinforcements, his situation became increasingly dire. After holding out for eight months, on 3/8 of Daiei 3 (1523), he finally surrendered and vacated the castle. Through the mediation of Rokkaku Sadayori, Hidenori and Takasato reconciled, but Sadayori had backed Takasato so the conditions of the settlement were extraordinarily unfavorable to Hidenori. Based on this resolution, Hidenori transferred the headship of the family to Takasato’s eldest son, Gamō Sadahide (Hidenori’s younger nephew whose name was pronounced the same but written with a different character than Hidenori’s grandfather), and was compelled to depart Otowa Castle which was left to ruin.
Having been ousted from Otowa Castle, Hidenori made a new base at one of the outlying castles named Kaigake Castle. In the twelfth month of 1525, Hidenori was murdered at Kaigake Castle. He did not have children, while his younger sister became a nun, so the lineage of Hideyuki (the main branch of the Gamō family) came to an end. Thereafter, the descendants of Takasato acquired the remaining territory and were regarded as the main branch of the Gamō family in name and in fact.
Takasato had his son, Sadahide, wed the daughter of Mabuchi Mikawa-no-kami, a member of the Rokkaku family. This political marriage was aimed to further strengthen the bonds between the Rokkaku and the Gamō as well as secure his position in the family. Takasato also sent one of his sons, 梵純, for adoption by the Aoki who were the home family of his wife. These arrangements enabled Takasato to expand his influence. In his latter years, he entered the priesthood, retiring at the Sesshu monastery. Takasato died in 1530.