Nishi-Ōhira Domain, Historical administrative domain in Mikawa Province, Japan
Nishi-Ōhira Domain was an administrative territory in Mikawa Province that spread across several districts including Nukata, Kamo, and Hoi. The area brought together scattered villages under a single central rule.
The territory began in 1748 when magistrate Ōoka Tadasuke received a 4,000 koku revenue and rose to daimyō status under the Tokugawa shogunate. This promotion marked the start of a new ruling period in the region.
The Ōoka clan maintained special privileges, being exempt from the sankin kōtai system while preserving their ancestral connections through graves at Jōken-ji temple.
As a historical administrative territory, there is no physical site to visit today. Information about the region can be found through museums or archives in the Mikawa area.
Founder Ōoka Tadasuke spent his entire life in Edo and never visited his own territory in person. He managed the region from afar until his death in 1757, proving a daimyō did not always need to be present on site.
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