# Koga Domain

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Koga Domain 古河藩 under Tokugawa shogunate Japan 1590–1871 Capital Koga Castle • Type Daimyō Historical era Edo period • Established 1590 • Disestablished 1871 Today part of part of Ibaraki Prefecture

Site of Koga Castle, administrative headquarters of Koga Domain

**Koga Domain** (古河藩, *Koga-han*) was a [feudal domain](/source/Han_(Japan)) under the [Tokugawa shogunate](/source/Tokugawa_shogunate) of [Edo period](/source/Edo_period) [Japan](/source/Japan). It is located in [Shimōsa Province](/source/Shim%C5%8Dsa_Province), [Honshū](/source/Honsh%C5%AB). The domain was centered at [Koga Castle](/source/Koga_Castle),[1] located in what is the city of [Koga](/source/Koga%2C_Ibaraki) in [Ibaraki Prefecture](/source/Ibaraki_Prefecture).

## History

During the [Muromachi period](/source/Muromachi_period), Koga was the seat of the [Kantō kubō](/source/Kant%C5%8D_kub%C5%8D), under the [Ashikaga clan](/source/Ashikaga_clan), who vied with the [Uesugi clan](/source/Uesugi_clan) and with the [Later Hōjō clan](/source/Later_H%C5%8Dj%C5%8D_clan) for control of eastern Japan. [Ashikaga Ujinohime](/source/Ashikaga_Ujinohime) was the last Koga-kubo and owner of Koga domain of the Ashikaga lineage.

When [Toyotomi Hideyoshi](/source/Toyotomi_Hideyoshi) defeated the Hōjō at the [Siege of Odawara](/source/Siege_of_Odawara_(1590)), the area fell into his hands, and was subsequently assigned (along with the rest of the [Kantō region](/source/Kant%C5%8D_region)) to [Tokugawa Ieyasu](/source/Tokugawa_Ieyasu). Ieyasu assigned Koga Castle to his grandson-in-law, Ogasawara Hidemasa as *[daimyō](/source/Daimy%C5%8D)* of Koga Domain, with assessed *[kokudaka](/source/Kokudaka)* of 30,000 *[koku](/source/Koku)*.

Afterwards, the domain was reassigned every couple of generations to a large number of *[fudai](/source/Fudai) daimyō* clans, spending the longest time under the control of the [Doi clan](https://en.wikipedia.org/w/index.php?title=Doi_clan&action=edit&redlink=1) (1633–1681, 1762–1871).

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

## Bakumatsu period holdings

As with most domains in the [han system](/source/Han_system), Koga Domain consisted of several discontinuous territories calculated to provide the assigned *[kokudaka](/source/Kokudaka)*, based on periodic [cadastral](/source/Cadastral) surveys and projected agricultural yields.[2][3]

- [Shimōsa Province](/source/Shim%C5%8Dsa_Province) - 27 villages in Katsushika District - 2 villages in [Sashima District](/source/Sashima_District%2C_Ibaraki)

- [Shimotsuke Province](/source/Shimotsuke_Province) - 13 villages in Samukawa District (entire district) - 68 villages in [Tsuga District](https://en.wikipedia.org/w/index.php?title=Tsuga_District,_Tochigi&action=edit&redlink=1) - 2 villages in [Aso District](/source/Aso_District%2C_Tochigi) - 2 villages in Yanada District - 2 villages in [Ashikaga District](/source/Ashikaga_District%2C_Tochigi)

- [Settsu Province](/source/Settsu_Province) - 5 villages in Nishinari District - 4 villages in Sumiyoshi District - 9 villages in Shimashimo - 5 villages in Yatabe District - 2 villages in Ubara District

- [Harima Province](/source/Harima_Province) - 6 villages in [Mino District](/source/Mino_District%2C_Hy%C5%8Dgo) - 4 villages in [Katō](/source/Kat%C5%8D_District%2C_Hy%C5%8Dgo) - 8 villages in [Taka District](/source/Taka_District%2C_Hy%C5%8Dgo) - 2 villages in Kasai District

- [Mimasaka Province](/source/Mimasaka_Province) - 30 villages in Kumenanjo District

## List of *daimyōs*

# Name Tenure Courtesy title Court Rank kokudaka Notes Ogasawara clan (fudai) 1590–1601 1 Ogasawara Hidemasa (小笠原秀政) 1590–1601 Hyōbu-daifu (兵部大輔) Lower 5th (従五位下) 30,000 koku transfer to Iida Domain Toda-Matsudaira clan (fudai) 1602–1612 1 Matsudaira Yasunaga (松平康長) 1602–1612 Tamba-no-kami (丹波守) Lower 4th (従四位下) 20,000 koku transfer to Kasama Domain Ogasawara clan (fudai) 1612–1619 1 Ogasawara Nobuyuki (小笠原信之) 1612–1614 Saemon-no-suke (左衛門佐) Lower 5th (従五位下) 20,000 koku transfer from Honjo Domain 2 Ogasawara Masanobu (小笠原政信) 1614–1619 Saemon-no-suke (左衛門佐) Lower 5th (従五位下) 20,000 koku transfer to Sekiyado Domain Okudaira clan (fudai) 1619–1622 1 Okudaira Tadamasa] (奥平忠昌) 1619–1622 Mimasaka-no-kami (美作守) Lower 4th (従四位下) 110,000 koku transfer to Utsunomiya Domain Nagai clan (fudai) 1622–1633 1 Nagai Naokatsu (永井直勝) 1622–1625 Ukon-no-daifu (右近大夫) Lower 5th (従五位下) 72,000 koku transfer from Kasama Domain 2 Nagai Naomasa (永井尚政) 1626–1633 Shinano-no-kami (信濃守) Lower 5th (従五位下) 72,000 koku transfer to Yodo Domain Doi clan (fudai) 1633–1681 1 Doi Toshikatsu (土井利勝) 1633–1644 Ooi-no-kami (大炊頭); Jijū (侍従) Lower 4th (従四位下) 160,000 koku from Sakura Domain 2 Doi Toshitaka (土井利隆) 1644–1658 Tōtōmi-no-kami (遠江守) Lower 5th (従五位下) 160,000→130,000 koku 3 Doi Toshishige (土井利重) 1658–1673 Ooi-no-kami (大炊頭) Lower 5th (従五位下) 130,000→100,000 koku 4 Doi Toshihisa (土井利久) 1673–1675 -none- -none- 100,000→70,000 koku 5 Doi Toshimasu (土井利益) 1675–1681 Suwo-no-kami (周防守) Lower 5th (従五位下) 70,000 koku transfer to Shima Domain Hotta clan (fudai) 1681–1685 1 Hotta Masatoshi (堀田正俊) 1681–1684 Chikuzen-no-kami (筑前守), Jijū (侍従) Lower 4th (従四位下) 130,000 koku transfer from Annaka Domain 2 Hotta Masanaka (堀田正仲) 1684–1685 Shimosa-no-kami (下総守) Lower 4th (従四位下) 130,000 koku transfer to Yamagata Domain Matsudaira (Fujii) clan (fudai) 1685–1693 1 Matsudaira Nobuyuki (松平信之) 1685–686 Hyuga-no-kami (日向守) Lower 5th (従五位下) 90,000 koku from Koriyama Domain 2 Matsudaira Tadayuki (松平忠之) 1686–1693 Hyuga-no-kami (日向守) Lower 5th (従五位下) 90,000 koku dispossessed Matsudaira (Nagasawa-Ōkōchi) clan (fudai) 1694–1712 1 Matsudaira Nobuteru (松平信輝) 1694–1709 Izu-no-kami (伊豆守) Lower 5th (従五位下) 70,000 koku from Shima-Toba Domain 2 Matsudaira Nobutoki (松平信祝) 1709–1712 Izu-no-kami (伊豆守) Lower 5th (従五位下) 70,000 koku to Yoshida Domain Honda clan (fudai) 1712–1759 1 Honda Tadanaga (本多忠良) 1712–1751 Nakatsukasa-daiyu (中務大輔), Jijū (侍従) Lower 4th (従四位下) 50,000 koku from Kariya Domain 2 Honda Tadahisa (本多忠敞) 1751–1759 Nakatsukasa-daiyu (中務大輔) Lower 5th (従五位下) 50,000 koku transfer to Hamada Domain Matsudaira (Matsui) clan (fudai) 1759–1762 1 Matsudaira Mitsuyuki (松平康福) 1759–1762 Suo-no-kami (周防守), Jijū (侍従) Lower 4th (従四位下) 50,000 koku transfer to Okazaki Domain Doi clan (fudai) 1762–1871 1 Doi Toshisato (土井利里) 1762–1777 Ooi-no-kami (大炊頭); Jijū (侍従) Lower 4th (従四位下) 70,000 koku 2 Doi Toshichika (土井利見) 1777–1777 Mimasaka-no-kami (美濃守) Lower 5th (従五位下) 70,000 koku 3 Doi Toshiatsu (土井利厚) 1777–1822 Ooi-no-kami (大炊頭); Jiju (侍従) Lower 4th (従四位下) 70,000→80,000 koku 4 Doi Toshitsura (土井利位) 1822–1848 Ooi-no-kami (大炊頭); Jiju (侍従) Lower 4th (従四位下) 80,000 koku 5 Doi Toshinari (土井利亨) 1848–1848 Ooi-no-kami (大炊頭) Lower 5th (従五位下) 80,000 koku 6 Doi Toshinori (土井利則) 1848–1867 Ooi-no-kami (大炊頭) Lower 5th (従五位下) 80,000 koku 7 Doi Toshitomo (土井利与) 1867–1871 Ooi-no-kami (大炊頭) Lower 5th (従五位下) 80,000 koku

## See also

- [List of Han](/source/List_of_Han)

## References

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

- Papinot, E (1910). *Historical and Geographic Dictionary of Japan*. Tuttle (reprint) 1972.

## External links

- (in Japanese) [Koga Domain on "Edo 300 HTML"](https://web.archive.org/web/20120128230014/http://www.asahi-net.or.jp/~me4k-skri/han/kantou/koga.html)

## Notes

1. **[^](#cite_ref-1)** ["Koga Castle" at JapaneseCastleExplorer.com](http://www.japanese-castle-explorer.com/province.html?name=Shimosa); retrieved 2016-12-2.

1. **[^](#cite_ref-2)** [Mass, Jeffrey P.](/source/Jeffrey_Mass) and William B. Hauser. (1987). [*The Bakufu in Japanese History,* p. 150](https://books.google.com/books?id=Hv99D510nHcC&pg=PA150&dq=).

1. **[^](#cite_ref-3)** Elison, George and Bardwell L. Smith (1987). [*Warlords, Artists, & Commoners: Japan in the Sixteenth Century,* p. 18](https://books.google.com/books?id=T2_5_W7UFXwC&pg=PA18&dq=).

v t e Domains of Kantō Numata Tatebayashi Isesaki Maebashi Takasaki Annaka Yoshii Nanokaichi Obata Ōtawara Kurobane Takatoku Satsuregawa Karasuyama Utsunomiya Mibu Fukiake Sano Ashikaga Mito Shishido Kasama Matsuoka Shimodate Shimotsuma Hitachi-Fuchū Shizuku Tsuchiura Yatabe Ushiku Asō Yūki Koga Sekiyado Takaoka Omigawa Tako Sakura Oyumi Tsurumaki Jōzai Ichinomiya Ōtaki Kururi Iino Sanuki Awa-Katsuyama Tateyama Funagata Okabe Oshi Iwatsuki Kawagoe Kanazawa Ogino-Yamanaka Odawara Japanese domains Tōhoku & Hokkaidō Kantō Hokuriku & Kōshin Chūbu Kinki Chūgoku Shikoku Kyūshū

Authority control databases International VIAF National Japan

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Adapted from the Wikipedia article [Koga Domain](https://en.wikipedia.org/wiki/Koga_Domain) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Koga_Domain?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.