Tomigusuku Ueekata Seizoku (豊見城 親方 盛続, 1520 – 28 May 1622), also known by his Chinese style name Mō Keiso (毛 継祖), was a bureaucrat of the Ryukyu Kingdom.
Seizoku put down the rebellion of the Jana family (謝名一族) together with two generals, Ikegusuku Anrai and Mabuni Ankō (摩文仁 安恒, also known as Kin Ōku 金 応煦).
Concerned about the rampant wakō pirates, King Shō Nei dispatched an army led by Seizoku to defend Nakijin Castle.
When Satsuma troops approached Naha, Gushichan Chōsei led a mission to hold peace talks at Oyamise (親見世).
Tomigusuku Seizoku, Kikuin, Kian, Ikegusuku Anrai, Esu Seishō (江洲 盛韶) and Tsuken Seisoku (津堅 盛則) were sent as assistants.