The Imagawa clan is a line of daimyos of medieval Japan, descended from the emperor Seiwa (850-880).
Imagawa Kuniuji, himself a grandson of Ashikaga Yoshiuji, settled in Imagawa (Mikawa province) in the xiii century and took the name of the place.
This family governed the provinces of Suruga and Tōtōmi from the 14th to the 16th century and their influence also included the province of Mikawa during the youth of Ieyasu Tokugawa.
The power of the clan will decline during its confrontation with the Oda clan. The Imagawa clan was defeated by Nobunaga Oda at the battle of Okehazama and Imagawa Yoshimoto was killed.
During the Edo period, the Imagawa were among the koke (the "great families").
At the end of the Edo period, Imagawa Norinobu, was wakadoshiyori of the Tokugawa shogunate administration.