Abe Tadaaki was a high-ranking government official in Japan under Tokugawa Iemitsu and Ietsuna, the third and fourth Tokugawa Shōgun. As the daimyō of the Oshi Domain in modern-day Saitama Prefecture, with an income of 80,000 koku, Abe was appointed wakadoshiyori in 1633, and rōjū shortly afterwards.