TheŌhama Domain (大浜藩,Ōhama-han) was a Japanesedomain of theEdo period. It was associated withShinano Province in modern-dayNagano Prefecture.
In thehan system, Ōhama was apolitical andeconomic abstraction based on periodiccadastral surveys and projected agricultural yields.[1] In other words, the domain was defined in terms ofkokudaka, not land area.[2] This was different from thefeudalism of the West.
The domain only existed for a few years. It ended in 1777.[citation needed]
The hereditarydaimyō was head of the clan and head of the domain. In Ōhama, the soledaimyō of Ōhama wasMizuno Tadatomo. Tadatomo had been a high-incomehatamoto with holdings in theSaku district ofShinano Province He was a page and later an assistant to the 10thshōgun,Tokugawa Ienari.[citation needed] In 1768, Mizuno became a head of the han of over 10,000koku.[3]
Tadatomo's family was later transferred to theNumazu Domain;[citation needed] and a cadet branch of theMizuno clan remained at Numazu until theMeiji Restoration.[4]
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