Uesugi Tomosada

Who was Uesugi Tomosada?

Uesugi Tomosada, also known as Ōgigayatsu Tomosada, was a samurai commander of the Ōgigayatsu branch of the Uesugi clan around the middle of Japan's Sengoku period.

The eldest legitimate son of Uesugi Tomooki of Ōgigayatsu, following his father's death in 1537, though he was still a child, Tomosada led an attack on the Late Hōjō clan in the Tachibana district of Musashi province. He established himself in the temple of Kandai-ji, which he fortified as a castle. Hōjō Ujitsuna took Kawagoe castle soon afterwards from Tomosada's uncle, Uesugi Tomonari, however.

In the 1546 battle of Kawagoe, Tomosada allied itself with Ashikaga Haruuji and Uesugi Norimasa of Yamauchi against Hōjō Ujitsuna and Hōjō Ujiyasu. He was killed in battle, and the attempt to regain the castle for the Uesugi was ultimately unsuccessful.

With Tomosada's death, the Ōgigayatsu branch came to an end.