page_title: Koga Castle
section_title: Description
hierarchical_section_title: Koga Castle / Description
caption_attribution_description: 日本語: 茨城県古河市にあった古河城の概要図
context_page_description: Koga Castle was a Japanese castle located in Koga, Ibaraki Prefecture, Japan. During the Muromachi period, Koga was the seat of the Kantō kubō, under the Ashikaga clan. At the end of the Edo period, Koga Castle was the administrative center of Koga Domain, which was held by a large number of fudai daimyō clans, spending the longest time under the control of the Doi clan.
context_section_description: Koga Castle was a flatland-style castle  built on a long, narrow peninsula in the middle of the Watarase River, with the river itself and wetlands to the east and south forming part of its natural defences. The central bailey Honmaru (本丸) had three-story donjon with a similar size and style as the donjon at Matsue Castle, which was officially styled as a yagura. The Honmaru was protected by the Ni-no-Maru (二の丸) to the west and the San-no-Maru (三の丸) to the north. Further north were two large forecourts: the Marunouchi Kuruwa ( 丸の内曲輪 ) and Kannonji Kuruwa ( 観音寺曲輪 ) and to the east as the long and narrow Higashiobi Kuruwa ( 東帯曲輪), and in the south the Yorimasa Kuruwa ( 頼政曲輪) and the Tatsuzaki Kuruwa ( 辰崎曲輪 ). An additional forecourt, the Suwa Kuruwa (諏訪輪 ) occupied a small area on the opposite bank of the river.
  Remaining today are the Yorimasa Jinja shrine on the site of the Yorimasa Kuruwa, and the Koga History Museum on the site of the Suwa Kuruwa, which preserves a fragment of the original moat.
caption: Plan of Koga Castle
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