Koga Domain

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title: "Koga Domain" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["domains-of-japan", "history-of-ibaraki-prefecture", "shimōsa-province", "fujii-matsudaira-clan", "honda-clan", "hotta-clan", "matsui-matsudaira-clan", "ogasawara-clan", "ōkōchi-matsudaira-clan", "okudaira-clan", "toda-matsudaira-clan", "doi-clan", "nagai-clan"] topic_path: "history" source: "https://en.wikipedia.org/wiki/Koga_Domain" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::data[format=table title="Infobox former subdivision"]

FieldValue
native_name古河藩
conventional_long_nameKoga Domain
common_nameKoga Domain
subdivisionHan
status_textunder Tokugawa shogunate Japan
government_typeDaimyō
capitalKoga Castle
political_subdiv
todaypart of Ibaraki Prefecture
year_start1590
year_end1871
date_start
event_end
date_end
event1
eraEdo period
event_pre
event_post
image_flag
image_border
flag_type
flag
symbol
stat_year1
stat_area1
stat_pop1
footnotes
::

|_noautocat = |native_name = 古河藩 |conventional_long_name = Koga Domain |common_name = Koga Domain |subdivision = Han |nation = |status_text = under Tokugawa shogunate Japan |government_type = Daimyō |capital = Koga Castle |coordinates = |political_subdiv = |today = part of Ibaraki Prefecture |year_start = 1590 |year_end = 1871 |event_start = |date_start = |event_end = |date_end = |event1 = |date_event1 = |event2 = |date_event2 = |event3 = |date_event3 = |event4 = |date_event4 = |event5 = |date_event5 = |life_span = |era = Edo period |event_pre = |date_pre = |event_post = |date_post = |image_flag = |image_border = |flag_type = |flag = |image_coat = |symbol_type = |symbol = |image_map = |image_map_caption = |stat_year1 = |stat_area1 = |stat_pop1 = |footnotes = thumb|right|alt=|Site of Koga Castle, administrative headquarters of Koga Domain Koga Domain was a feudal domain under the Tokugawa shogunate of Edo period Japan. It is located in Shimōsa Province, Honshū. The domain was centered at Koga Castle, located in what is the city of Koga in Ibaraki Prefecture.

History

During the Muromachi period, Koga was the seat of the Kantō kubō, under the Ashikaga clan, who vied with the Uesugi clan and with the Later Hōjō clan for control of eastern Japan. Ashikaga Ujinohime was the last Koga-kubo and owner of Koga domain of the Ashikaga lineage.

When Toyotomi Hideyoshi defeated the Hōjō at the Siege of Odawara, the area fell into his hands, and was subsequently assigned (along with the rest of the Kantō region) to Tokugawa Ieyasu. Ieyasu assigned Koga Castle to his grandson-in-law, Ogasawara Hidemasa as daimyō of Koga Domain, with assessed kokudaka of 30,000 koku.

Afterwards, the domain was reassigned every couple of generations to a large number of fudai daimyō clans, spending the longest time under the control of the Doi clan (1633–1681, 1762–1871).

During the Boshin War, the Tokugawa shogunate ordered the domain to provide guards on the foreign settlement at Yokohama. However, the domain capitulated almost immediately on the approach of the imperial forces. The final daimyō of Koga, Doi Toshitomo, served as domain governor until 1871, and was awarded the title of shishaku (marquis) under the kazoku peerage system. Koga Domain subsequently became part of Ibaraki Prefecture.

Bakumatsu period holdings

As with most domains in the han system, Koga Domain consisted of several discontinuous territories calculated to provide the assigned kokudaka, based on periodic cadastral surveys and projected agricultural yields.

List of ''daimyōs''

::data[format=table] | #||Name || Tenure || Courtesy title || Court Rank || kokudaka ||Notes | |---| | [[File:Mon ogasawara.svg|25px]] Ogasawara clan (fudai) 1590–1601 | | |1 | | [[File:Mon Toda sechs Sterne.svg|25px]] Toda-Matsudaira clan (fudai) 1602–1612 | | |1 | | [[File:Mon ogasawara.svg|25px]] Ogasawara clan (fudai) 1612–1619 | | |1 | | |2 | | [[File:Japanese Crest Okudaira Uchiwa.svg|25px]] Okudaira clan (fudai) 1619–1622 | | |1 | | [[File:Japanese Crest Nagato mitu Hosi.svg|25px]] Nagai clan (fudai) 1622–1633 | | |1 | | |2 | | [[File:Japanese Crest mutu Suisha.svg|25px]] Doi clan (fudai) 1633–1681 | | |1 | | |2 | | |3 | | |4 | | |5 | | [[File:Japanese crest Hotta Mokkou.svg|25px]] Hotta clan (fudai) 1681–1685 | | |1 | | |2 | | [[File:Japanese Crest Maru ni Katabami.svg|25px]] Matsudaira (Fujii) clan (fudai) 1685–1693 | | |1 | | |2 | | [[File:Maru ni Mitsu Ōgi inverted.png|25px]] Matsudaira (Nagasawa-Ōkōchi) clan (fudai) 1694–1712 | | |1 | | |2 | | [[File:Japanese crest Honda Tachi Aoi.svg|25px]] Honda clan (fudai) 1712–1759 | | |1 | | |2 | | [[File:Japanese crest Tuta.svg|25px]] Matsudaira (Matsui) clan (fudai) 1759–1762 | | 1 | | [[File:Japanese Crest mutu Suisha.svg|25px]] Doi clan (fudai) 1762–1871 | | |1 | | |2 | | |3 | | |4 | | |5 | | |6 | | |7 | ::

References

  • The content of this article was largely derived from that of the corresponding article on Japanese Wikipedia.

Notes

References

  1. [http://www.japanese-castle-explorer.com/province.html?name=Shimosa "Koga Castle" at JapaneseCastleExplorer.com]; retrieved 2016-12-2.
  2. [[Jeffrey Mass
  3. Elison, George and Bardwell L. Smith (1987). [https://books.google.com/books?id=T2_5_W7UFXwC&pg=PA18&dq= ''Warlords, Artists, & Commoners: Japan in the Sixteenth Century,'' p. 18].

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domains-of-japanhistory-of-ibaraki-prefectureshimōsa-provincefujii-matsudaira-clanhonda-clanhotta-clanmatsui-matsudaira-clanogasawara-clanōkōchi-matsudaira-clanokudaira-clantoda-matsudaira-clandoi-clannagai-clan