Tanuma Okitsugu was a rōjū of the Tokugawa shogunate who introduced monetary reform.
Okitsugu Tanuma was born on September 11, 1719 in Tokyo, Japan.
He was also a daimyo, and ruled the Sagara han. He used the title Tonomo-no-kami. His regime is often identified with rampant corruption and huge inflation of currency.
In Tenmei 4 (1784), Okitsugu's son, the wakadoshiyori (junior counselor) Tanuma Okitomo, was assassinated inside Edo Castle. Okitomo was killed in front of his father as both were returning to their norimono after a meeting of the Counselors of State had broken up. Okitomo was killed by Sano Masakoto, a hatamoto.
The involvement of senior figures in the bakufu was suspected, but only the assassin himself was punished. The result was that the Tanuma-initiated, liberalizing reforms within the bakufu and the relaxation of the strictures of sakoku were blocked.