Sumpu Castle (or Sunpu, depending on transliteration) was first established around 1337-8 as a palace for Imagawa Norikuni. Its later ruler, Tokugawa Ieyasu, was made a captive of the Imagawa family in Sumpu in 1549; following the fall of the Imagawa family at the Battle of Okehazama (1560) it went on to become his residence after a brief rule by the Takeda clan. The castle burned down twice in separate fires (1607 and 1635) in the early Edo period. After the second incident, the seven-story donjon was never rebuilt and its former location today is the site of a parking lot. Upon the Meiji Restoration, most of the remaining structures were dismantled and the site turned into a park (Sumpu-kōen). The Tatsumi-yagura and adjoining Higashi-mon (pictured) were rebuilt in 1989 and 1996 respectively.