Uesugi Tomomasa




Sagami Province

Lifespan:  14xx to 15xx

Other Names:  Nanasawa Tomomasa, Zuiōin-本東, 光迪 (monk’s name)

Rank:  bushi

Title:  Assistant Vice-Minister of Justice

Clan:  Ōgigayatsu-Uesugi

Bakufu:  Muromachi

Father:  Uesugi Mochitomo

Siblings:  Akifusa, Miura Takahira, sister (formal wife of Uesugi Noritada), Sadamasa, 叔彭梵寿, Tomomasa, sister (formal wife of Kira Shigetaka), sister (formal wife of Ōishi Fusashige)

Children:  永明軒 Higashinaga (Udagawa Chikasada), Tomoyasu, Tomoyoshi, daughter (formal wife of Uesugi Norifusa), Norikatsu (?)

Uesugi Tomomasa served as a bushi during the Muromachi and Sengoku periods.

Given that he was based at Nanasawa Castle in Sagami Province, he is also known as Nanasawa Tomomasa.

Tomomasa was born as the son of Uesugi Mochitomo.  There is limited information concerning the details of his life.  Initially, he entered the Shōkoku Temple in Kyōto as a monk under the name of 本東.

In 1458, the individual who met Ashikaga Yoshimasa (the eighth shōgun of the Muromachi bakufu) as a representative of his father, Mochitomo, is deemed to be an ancestor of Tomomasa.

During the outbreak of the Kyōtoku Conflict in 1455, Tomomasa served as the monk responsible for calling other monks to meals at the Rokuon subtemple of the Shōkoku Temple.  Later, for some reason, he returned to secular life and had a role in governing the territory of the Ōgigayatsu-Uesugi family, entering Nanasawa Castle located in the central portion of Sagami Province.  In later years, he guarded Ōba Castle, a stronghold in the east of the province, so it is surmised that he was in a position to govern both districts of the Ōgigayatsu-Uesugi.  In 1480, he offered gifts to Ashikaga Yoshimasa and Ashikaga Yoshihisa (father and son) and appeared to have exchanges with the bakufu independently of the head of the Ōgigayatsu-Uesugi, suggesting his high stature in political circles.  Based on these precedents, Tomomasa was an exceptionally capable member of the Ōgigayatsu-Uesugi family.

From the beginning in 1476 of the Revolt of Nagao Kageharu, in 1477, Tomomasa joined Ōta Dōkan and Chiba Yoritane in an attack against Toshima Yasutsune.  This is known as the Battle of Egotahara-Numabukuro.  In 1487, the Uesugi clan was beset by internal discord during the Chōkyō Conflict.  In 1488, Tomomasa incurred an assault by Uesugi Akisada, the deputy shōgun of the Kantō that resulted in the fall of Nanasawa Castle so, thereafter, he was based in the fortress at Ōba.

In 1494, after the death of his older brother (Uesugi Sadamasa) Tomomasa’ son (Uesugi Tomoyoshi) became the adopted heir of Sadamasa and next head of the clan under the guardianship of Tomomasa.  Owing, however, to the advance into Sagami by Ise Sōzui (Hōjō Sōun), the Uesugi lost power.  On 9/6 of Meiō 8 (1499), a Buddhist ceremony was held to mark the thirty-second anniversary of the death of his father, Mochitomo.  At this time, the living sons of Mochitomo included Miura Takahira, 叔彭梵寿, and Tomomasa.  During the Eishō era (1504 to 1521), Tomomasa re-entered the priesthood and adopted the name of 光迪.  His movements thereafter are unknown.  He is understood to have died at the age of seventy-one, but it is uncertain.


A monk at the Higashinaga-Kenchō Temple.  He developed the area near the present-day Edogawa ward in Tōkyō.  The Udagawa clan who settled there are descendants of the Higashinaga.

Uesugi Tomoyasu.  In genealogical records, referred to as Tomonori and the older brother of Tomoyoshi with the title of Assistant Vice-Minister of Popular Affairs.  His son, Uesugi Tomooki, later became the head of the Ōgigayatsu-Uesugi family.

A daughter who was the formal wife of Uesugi Norifusa.  After the death of Norifusa in 1525, she returned to her family home.  In 1530, upon the wishes of Uesugi Tomooki, her nephew who was the head of the family at the time, she became a consort of Takeda Nobutora.  Three years later, owing to the marriage of Tomooki’s daughter and Takeda Tarō (the lineal heir of Nobutora), the Ōgigayatsu-Uesugi and the Takeda clans became relatives through marriage, forging ties stronger than by means of an alliance.