Naegi Domain

 was a feudal domain of Edo period Japan It was located in Mino Province, in central Honshū. The domain was centered at Naegi Castle, located in what is now the city of Nakatsugawa in Gifu Prefecture. It is the smallest domain within the Tokugawa shogunate which was styled as a “castle holding domain”.
History.
The Tōyama clan were rulers of this portion of southeast Mino Province (a portion of the districts of Kamo and Ena) since the Kamakura period. Toyama Tomotada and his son Toyama Tomomasa pledged fealty to Oda Nobunaga. However, after Nobunaga’s death, their territory was overrun by the Mōri clan, and was given to Kawajiri Hidenaga. The Toyama fled to Hamamatsu, where they sought protection from Tokugawa Ieyasu. During the Battle of Sekigahara, Kawajiri Hidenaga sided with the pro-Toyotomi Western Army under Ishida Mitsunari, and was killed in battle. Ieyasu sent Toyama Tomomasa to retake his clan’s ancestral domains. With the establishment of the Tokugawa shogunate, he was confirmed as daimyō of the 10,500 "koku" Naegi Domain. Tomomasa went on to participate in the Siege of Osaka, and died in Naegi in 1619.
The domain remained in the hands of the Tōyama clan throughout its existence. However, as a small domain with heavy expenditures, it soon fell into severe debt, which continued to mount from generation to generation, despite efforts to open new rice lands, impose fiscal frugality, and the issuance of paper currency on several occasions. . 
The 12th "daimyō", Tōyama Tomoyoshi, served as "wakadoshiyori" for two terms during the Bakumatsu period, and led the domain’s forces in the Second Chōshū expedition.
At the time of the Meiji restoration, the domain was 143,000 gold "ryō" and 15,900 paper ryō in debt. When Naegi Castle was pulled down by order of the new government, its furnishing and timber were all sold as part of the effort the repay this debt. The stipend received from the government as compensation for relinquishing the domain also went towards debt repayment, and many samurai were forced to abandon their social status in order to take up money-making trades. By August 1871, at the time of the abolition of the han system, the debt had been reduced to 52,600 gold and 5000 paper "ryō". The former domain lands were absorbed into Gifu Prefecture; however, due to the remaining debt, all samurai left in the domain were reduced to commoner status, and were denied the government stipend promised to their social class. This created great discontent, and the State Councilor responsible, Aoyama Naomichi, faced several assassination attempts, the last of which was in 1891.
Bakumatsu period holdings.
As with most domains in the han system, Naegi Domain consisted of a discontinuous territories calculated to provide the assigned "kokudaka", based on periodic cadastral surveys and projected agricultural yields.