During the
Muromachi period, the area which later became the city of Komoro was under the control of a local warlord, Oi Mitsutada, who built a fortification at the site of Komoro Castle. After the area came under the control of
Takeda Shingen by 1554, the fortification was completely reconstructed into a castle under the direction of Shingen's master strategist
Yamamoto Kansuke. Following the destruction of the Takeda clan by
Oda Nobunaga in 1582, the castle was given to
Takigawa Kazumasu, one of Nobunaga's generals. After Nobunaga was assassinated in the
Honnō-ji incident, it came briefly under the control of the
Later Hōjō clan of
Odawara. After 1590, following the
Battle of Odawara, Komoro came under the control of
Tokugawa Ieyasu, who assigned it to his general Sengoku Hidehisa as daimyō of
Komoro Domain, a 50,000
koku holding later confirmed under the
Tokugawa shogunate. He reinforced the walls and reorganized the structure around a central bailey surrounded by a north and south bailey. He was followed by his son,
Sengoku Tadamasa. Tadamasa improved the castle, and the three-story
Tenshukaku's foundation dates from this time. The domain was transferred to the Hisamatsu branch of the
Matsudaira clan from 1624–1648. In 1626, the donjon was struck by lightning and burned down. It was never rebuilt. The domain and castle subsequently passed through a number of clans: the Aoyama from 1648-1662, the Sakai from 1662-1679, the Nishio from 1679–1682 and the Ishikawa clanfrom 1682–1702. In 1702, a junior branch of the Makino clan was awarded Komoro, and remained in control until the end of the
Edo period. The castle was damaged from
flooding in 1742 (
ja). Following the
Meiji Restoration, Komoro Castle was abandoned, and in 1871 with the
abolition of the han system, most of its remaining structures were demolished or donated to nearby Buddhist temples and a merchant house. ==Kaikoen==