Ichinomiya Domain

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Ichinomiya Domain (一宮藩 Ichinomiya-han?) was a Japanese domain of the Edo period, located in Kazusa Province (modern-day Chiba Prefecture), Japan. It was centered on Ichinomiya jin'ya in what is now the town of Ichinomiya, Chiba.

In the han system, Ichinomiya was a political and economic abstraction based on periodic cadastral surveys and projected agricultural yields.[1] In other words, the domain was defined in terms of kokudaka, not land area.[2] This was different from the feudalism of the West.


Ichinomiya Castle was a mountain-top fortification built by the Satomi clan, rulers of most of the Bōsō Peninsula during the Sengoku period as protection for their northern holdings in eastern Kazusa Province . Following the Battle of Odawara in 1590, the Kantō region was assigned to Tokugawa Ieyasu by the warlord Toyotomi Hideyoshi, who also restricted the Satomi to Awa Province for their lukewarm support of his campaigns against the Late Hōjō clan. Tokugawa Ieyasu appointed Honda Tadakatsu, one of his hereditary retainers, to be daimyō of the new 100,000 koku Otaki Domain, and the old fortifications at Ichinomiya were abandoned.

Otaki Domain was subsequently reduced in size, with large portions becoming tenryō territory directly under the control of the Tokugawa shogunate or assigned as exclaves of other domains. Ichinomiya became an exclave of Hatsuta Domain of Kii Province, ruled by the Kanō clan.

In 1826, Kanō Hisatomo, the 5th daimyō of Hatsuta Domain, decided to relocate the seat of the clan from Kii Province to Ichinomiya in Kazusa Province, where his family continued to rule until the Meiji Restoration. The final daimyō of Ichinomiya Domain, Kanō Hisayoshi, was a strong supporter of rangaku, and imported western weapons to modernize his forces. However, he was stopped at Shimoda on his way to assist the Satchō Alliance forces at the Battle of Toba-Fushimi during the Boshin War and arrived too late for the battle. Under the new Meiji government he was appointed domain governor, until the abolition of the han system in July 1871 and subsequently became a viscount under the kazoku peerage. Ichinomiya Domain became “Ichinomiya Prefecture”, which merged with the short lived “Kisarazu Prefecture” in November 1871, which later became part of Chiba Prefecture.

List of daimyō[edit]

# Name Tenure Courtesy title Court Rank revenues
1 Kanō Hisatomo ( 加納久儔?) 1826-1842 Tōtōmi-no-kami Lower 5th (従五位下) 10,000 koku
2 Kanō Hisaakira ( 加納久徴?) 1842-1864 Suruga-no-kami Lower 5th (従五位下) 10,000 koku
3 Kanō Hisatsune ( 加納久恒?) 1864-1867 Yamato-no-kami Lower 5th (従五位下) 10,000 koku
4 Kanō Hisayoshi ( 加納久宜?) 1867-1871 Tōtōmi-no-kami Lower 5th (従五位下) 13,000 koku


  1. ^ Mass, Jeffrey P. and William B. Hauser. (1987). The Bakufu in Japanese History, p. 150.
  2. ^ Elison, George and Bardwell L. Smith (1987). Warlords, Artists, & Commoners: Japan in the Sixteenth Century, p. 18.

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