The following excerpt is from Wikipedia:
“Gamō Ujisato
In this Japanese name, the family name is Gamō.
Gamō Ujisato (蒲生 氏郷, 1556 – March 17, 1595) was a Japanese daimyō [samurai] of the Sengoku and Azuchi–Momoyama periods. The heir and son of Gamō Katahide, lord of Hino Castle in Ōmi Province, he later held Matsusaka (Ise Province) and finally Aizuwakamatsu Castle in Mutsu Province. He also controlled Obama Castle through one of his retainers, Gamō Chūzaemon.”
Ujisato was a great daimyo, or samurai, of the Sengoku and Azuchi momoyama periods. He built the castle in our city Matusaka in 1588. It has been a long time since he left here, but we still praise his achievements. In fact, we hold a festival on November 3 every year to commemorate him.
What did he do?
He was born in a small daimyo family in the Hino Shiga prefecture, and he worked as the servant to Nobunaga Oda family when he was a child. It seems that he was great with kids, he studied a lot, and he was also interested in overseas countries. Nobunaga liked him so much that he gave his sweet daughter Fuyuhime to Ujisato. They got married, and that’s when he built his castle in our city.
He is also known for being a great tea master in Sengoku period. He learned the tea ceremony traditions from Rikyu Sen (he is my tea school’s ancestor. The family goes back 15 generations.) The family has a very long history and this relationship between the samurai and tea master’s family created Japan. Do you believe that?
He was good at business as well. He sent a ship to Italy and let his employees study abroad. They brought back double entry bookkeeping systems, and they started a business in an industry similar to textile and paper. This is said to be the beginning of the Matsusaka merchant.
He was Christian; he always remembered his faith, and he was a trusted samurai by many warlords. Although he died young, it is said that if he had lived a long time, he could have unified Japan.