[1] In the han system, Tsushima was a political and economic abstraction based on periodic cadastral surveys and projected agricultural yields.

Although it fought against Tokugawa Ieyasu at the battle of Sekigahara, the Sō clan was allowed by the shogunate to continue to rule Tsushima and entrusted it to diplomatic negotiations and trade with Joseon Korea.

Increasing threats of Western imperial powers weighed heavily on the Fuchū domain.

The loss of human resources prevented Tsushima from playing a significant role at the Meiji Restoration.

[citation needed] The last daimyō of Tsushima, Sō Shigemasa (Yoshiaki) became Governor of Izuhara Prefecture in 1869 and after the Abolition of the han system was given the title of Count (hakushaku) in 1884.