Kōfu Domain (甲府藩, Kōfu-han) was a feudal domain under the Tokugawa shogunate of Edo period Japan.
The domain was centered at Kōfu Castle what is now the city of Kōfu, Yamanashi.
[1] Kai Province was initially entrusted to important Tokugawa clan members as Kōfu Domain, and later to the highly placed fudai daimyō Yanagisawa clan, with periods of direct shogunal rule ( tenryō ) in between.
Following the transfer of Yanagisawa Yoshisato to Yamato Province in 1724, the domain remained under direct shogunal control until the Meiji Restoration.
[2] With the abolition of the han system in July 1871, Kōfu Domain became “Kōfu Prefecture”, which subsequently was renamed Yamanashi Prefecture.