His loss of the Izu Province to Hōjō Sōun in 1492–1498 marked a significant development of Japan's Sengoku period.
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Sōun, with Tamekage's help, would go on to conquer some of Sagami Province, and become one of the most major figures of the Sengoku period; Tamekage's son Uesugi Kenshin would likewise become a major warlord of the period, his rise with the Kantō as the center of his power base, as the result of Akisada's loss, a crucial element to his success.
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Nagao Tamekage, rose up against him in 1510 with the help of Hōjō Sōun, seizing the province and killing Akisada.
Uesugi Kenshin | Uesugi clan | Uesugi Kagekatsu | Uesugi Norimasa | Uesugi | Uesugi Kagenobu |