| Native Name: | 松岡藩 Matsuoka-han |
| Conventional Long Name: | Matsuoka Domain |
| Subdivision: | Han |
| Nation: | Japan |
| Title Leader: | Daimyō |
| Leader1: | Tozawa Masamori (first) |
| Year Leader1: | 1602-1622 |
| Leader2: | Nakayama Nobuaki (last) |
| Year Leader2: | 1861–1871 |
| Capital: | Matsuoka Castle |
| Coordinates: | 36.7403°N 140.7064°W |
| Membership Title1: | Province |
| Membership1: | Hitachi Province |
| Today: | Ibaraki Prefecture |
| Year Start: | 1602 |
| Year End: | 1871 |
| Event Start: | Establishment of the Tokugawa shogunate |
| Event End: | Abolition of the han system |
| Era: | Edo period |
, also known as 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 Matsuoka Castle in what is now the city of Takahagi, Ibaraki. With the exception of its first twenty years, was ruled by the Nakayama clan.
Following the Battle of Sekigahara, in 1600, Tokugawa Ieyasu shifted the Satake clan from its ancestral territories in Hitachi Province to Dewa Province in northern Japan. In 1602, he awarded a portion of the former Satake lands to Tozawa Masamori, marking the start of Matsuoka Domain. He served in a number of important posts within the administration of the Tokugawa shogunate, and was subsequently transferred to Shinjō Domain in Dewa Province in 1622. Matsuoka Domain was divided, with 30,000 koku going to Mito Domain and 10,000 koku to Tanagura Domain.
In 1646, the hereditary karō of Mito Domain, Nakayama Nobumasa, established his residence at Matsuoka. His son, Nakayama Nobuyoshi was confirmed under Tokugawa Yorifusa, to have holdings of 20,000 koku as a subsidiary domain of Mito Domain.
The 6th daimyō of Matsuoka, Nakayama Nobutoshi, moved his residence to Ōta, and the domain was then referred to as . His descendants continued to reside at Ōta until the time of the 10th daimyō, Nakayama Nobutaka, who returned the seat of the clan back to Matsuoka. During the Boshin War, the 14th daimyō, Nakayama Nobuaki, sided with the pro-Imperial forces, and after the Meiji restoration in 1868, Matsuoka Domain was finally recognized as independent of Mito Domain. The following year, the position of daimyō was abolished, and Nakayama Nobuaki became domain governor until retiring from public life with the abolition of the han system in 1871. His son Nobuzane would be created the first Baron Nakayama during the conversion of the old feudal titles to kazoku peerage in 1884.[1]
The domain had a total population of 12,805 people in 2842 households per a census in 1869.[2]
Unlike most domains in the han system, Matsuoka Domain consisted of a single territory calculated to provide the assigned kokudaka, based on periodic cadastral surveys and projected agricultural yields.[3] [4]
| Name | Tenure | Courtesy title | Court Rank | kokudaka | ||
| Tozawa clan (tozama) 1602-1622 | ||||||
| 1 | 1602-1622 | Ukyo-no-suke (右京亮) | Junior 5th Rank, Lower Grade (従五位下) | 40,000 koku | ||
| Nakayama clan (tozama) 1622-1871 | ||||||
| 1 | (ja) | 1622-1642 | Bizen-no-kami (備前守) | Junior 5th Rank, Lower Grade (従五位下) | 25,000 koku | |
| 2 | 1642–1651 | Higashi-ichi-no-kami (東市正) | Junior 5th Rank, Lower Grade (従五位下) | 25,000 koku | ||
| 3 | 1651-1681 | Bizen-no-kami (備前守) | Junior 5th Rank, Lower Grade (従五位下)) | 25,000 koku | ||
| 4 | 1681-1682 | Ichi-no-kami (市正) | Junior 5th Rank, Lower Grade (従五位下) | 25,000 koku | ||
| 5 | 1683-1703 | Bizen-no-kami (備前守) | Junior 5th Rank, Lower Grade (従五位下) | 25,000 koku | ||
| 6 | 1703-1711 | Bizen-no-kami (備前守) | Junior 5th Rank, Lower Grade (従五位下) | 25,000 koku | ||
| 7 | 1711-1712 | Ichi-no-kami (市正) | Junior 5th Rank, Lower Grade (従五位下) | 25,000 koku | ||
| 8 | 1712-1743 | Bizen-no-kami (備前守) | Junior 5th Rank, Lower Grade (従五位下) | 25,000 koku | ||
| 9 | 1743-1771 | Bizen-no-kami (備前守) | Junior 5th Rank, Lower Grade (従五位下) | 25,000 koku | ||
| 10 | 1771-1819 | Bitchu-no-kami (備中守) | Junior 5th Rank, Lower Grade (従五位下) | 25,000 koku | ||
| 11 | 1819-1828 | Bitchu-no-kami (備中守) | Junior 5th Rank, Lower Grade (従五位下) | 25,000 koku | ||
| 12 | 1828-1857 | Bingo-no-kami (備後守) | Junior 5th Rank, Lower Grade (従五位下) | 25,000 koku | ||
| 13 | 1857-1861 | Bizen-no-kami (備前守) | Junior 5th Rank, Lower Grade (従五位下) | 25,000 koku | ||
| 14 | (ja) | 1861-1871 | Bitchu-no-kami (備中守) | Junior 5th Rank, Lower Grade (従五位下) | 25,000 koku | |
| 1871- | Baron (男爵) | Junior 3th Rank (従三位) | ||||