Tanuma Okitsugu (田沼意次) (September 11, 1719, in Edo, Japan – August 25, 1788, in Edo) was a chamberlain (sobashū) and a senior counselor (rōjū) to the shōgun Tokugawa Ieharu of the Tokugawa Shogunate, in the Edo period of Japan. Tanuma and his son exercised tremendous power, especially in the last 14 years of shogun Ieharu's reign. He is known for the economic reforms of the Tenmei era and rampant corruption. He was also a daimyō of the Sagara Domain. Tanuma used the title Tonomo-no-kami.