Early life He was born in 1556 as the heir to Gamō Katahide, lord of Hino Castle in Ōmi Province. The
Gamō clan was a senior vassal of the
Rokkaku clan, a daimyo in Ōmi Province. However, when Nobunaga Oda entered
Kyoto, the Gamō clan left the Rokkaku clan and became vassals of the
Oda clan. Nobunaga recognised Ujisato's qualities at their first meeting and liked his intelligent manner, saying that the sharp look in his eyes showed that he was no ordinary man, and Nobunaga had Ujisato serve close to him. In May 1569, Ujisato reached the
manhood (
Genpuku) at the age of 14 and used the name . When Shibata Katsuie took charge of the Hokuriku campaign in 1575, the Gamō clan and other Ōmi-shū were separated from Katsuie and the Gamō clan served as
hatamoto under Nobunaga's direct command, based at Hino Castle. Nobunaga moved his headquarters to
Azuchi in 1576, but like other former Ōmi-shu, the Gamō clan did not move to Azuchi Castle, but remained in their own territory at Hino Castle. Ujisato moved from place to place to fight while learning about governance under his father, and he increasingly acted independently of his father from around 1581. As a result of his exploits in the
Battle of Shizugatake in 1583 and
Komaki Nagakute in 1584, he was transferred to Matsugashima Castle in
Ise Province in 1584 with 120,000 koku. He then built a new castle,
Matsusaka Castle, in Yoiho no Mori in 1588. Aizu was surrounded by major forces such as
Date Masamune and
Mogami Yoshiaki, who were not to be underestimated, and Ōshū was also an important place to monitor
Uesugi Kagekatsu in Echigo and to check Tokugawa Ieyasu in Kanto. Therefore, Hideyoshi, who highly valued Ujisato's abilities, appointed Ujisato as the commander-in-chief of the Toyotomi regime's forces to occupy Ōshū. He was therefore given 420,000 koku to provide him with sufficient troops, later increased to 730,000 koku and eventually given a grand estate of 920,000 koku.
Death and subsequent events Ujisato fell ill at Nagoya in
Hizen Province, where he was stationed for the Korean campaign, and returned to Aizu in November 1593. The illness worsened and he did not get better. Ujisato went to Kyoto in 1594 and received medical treatment from renowned doctors. However, his condition did not improve and he died at the age of 40 at his residence in
Fushimi, Kyoto, in 1595. After Ujisato's death, his son
Gamō Hideyuki inherited the reigns of the family, but the Gamō clan was reduced to 120,000 koku and transferred to
Utsunomiya,
Shimotsuke Province, due to
O-Ie Sōdō. Uesugi Kagesatsu was transferred to Aizu, but was defeated at the
Battle of Sekigahara against Tokugawa Ieyasu and was transferred to
Yonezawa. Hideyuki joined Ieyasu's side and was given 600,000 koku for his military service and was transferred again to Aizu, but he died prematurely. == Personality ==