| Conventional Long Name: | Ishioka Domain Hitachi-Fuchū Domain |
| Common Name: | Hitachi-Fuchū Domain |
| Subdivision: | Domain |
| Nation: | Japan |
| Government Type: | Daimyō |
| P1: | Hitachi Province |
| S1: | Prefectures of Japan#Former prefecturesIshioka Prefecture |
| Today: | Ibaraki Prefecture |
| Year Start: | 1602 |
| Year End: | 1871 |
| Era: | Edo period |
was a feudal domain under the Tokugawa shogunate of Edo period Japan, located in Hitachi Province (modern-day Ibaraki Prefecture), Japan. It was centered on Fuchū Jin'ya in what is now the city of Ishioka, Ibaraki. It was also known as or
The domain was created in 1602, when Rokugō Masanori, the head of the Rokugō clan, a prominent family of Dewa Province, was awarded a 10,000 koku holding in Hitachi-Fuchū for serviced rendered to Tokugawa Ieyasu during the Battle of Sekigahara. The clan was transferred to Honjō Domain in Dewa in 1623. The domain then passed into the hands of the Minagawa clan until 1645, when that clan was reduced to hatamoto status for lack of a direct heir.
In 1700, the domain was revived for the 5th son of Tokugawa Yorifusa of Mito Domain, who assumed the Matsudaira surname. The Matsudaira continued to rule the domain until the Meiji restoration. The domain was renamed Ishioka-han in 1869. It was abolished in the Haihan Chiken order of 1871.
The domain had a population of 16,913 people in 2774 households, of who, 901 were classed as samurai in 198 household and 182 were classed as ashigaru in 109 households per a census in 1869.[1]
As with most domains in the han system, Hitachi-Fuchū Domain consisted of several discontinuous territories calculated to provide the assigned kokudaka, based on periodic cadastral surveys and projected agricultural yields.[2] [3]
| Name | Tenure | Courtesy title | Court Rank | kokudaka | |
| Rokugō clan (tozama) 1602-1623 | |||||
| 1 | 1602–1623 | Hyōgō-gashira (兵庫頭) | Lower 5th (従五位下) | 10,000 koku | |
| Minagawa clan (fudai) 1623-1645 | |||||
| 1 | 1623–1625 | Yamashiro-no-kami (山城守) | Lower 4th (従四位下) | 10,000 koku | |
| 2 | 1625–1645 | Yamashiro-no-kami (山城守) | Lower 5th (従五位下) | 10,000 ->15,000 ->18,000 koku | |
| 3 | 1645–1645 | -none- | -none- | 18,000 koku | |
| tenryō | 1645–1700 | ||||
| Matsudaira clan (Shinpan) 1700-1871 | |||||
| 1 | 1700–1705 | Harima-no-kami (播磨守); Jiju (侍従) | Lower 4th (従四位下) | 20,000 koku | |
| 2 | 1705–1707 | Noto-no-kami (能登守); Jiju (侍従) | Lower 4th (従四位下) | 20,000 koku | |
| 3 | 1707–1733 | Harima-no-kami (播磨守); Jiju (侍従) | Lower 4th (従四位下) | 20,000 koku | |
| 4 | 1733–1735 | Harima-no-kami (播磨守); Jiju (侍従) | Lower 4th (従四位下) | 20,000 koku | |
| 5 | 1735–1742 | Harima-no-kami (播磨守); Jiju (侍従) | Lower 4th (従四位下) | 20,000 koku | |
| 6 | 1742–1784 | Harima-no-kami (播磨守); Jiju (侍従) | Lower 4th (従四位下) | 20,000 koku | |
| 7 | 1784–1795 | Ukon-daibu (右京大夫) | Lower 4th (従四位下) | 20,000 koku | |
| 8 | 1795–1833 | Harima-no-kami (播磨守); Jiju (侍従) | Lower 4th (従四位下) | 20,000 koku | |
| 9 | 1833–1868 | Ukon-daibu (右京大夫) | Lower 4th (従四位下) | 20,000 koku | |
| 10 | 1868–1871 | Harima-no-kami (播磨守) | Lower 4th (従四位下) | 20,000 koku | |