Nanokaichi Domain (七日市藩, Nanokaichi-han) was a feudal domain under the Tokugawa shogunate of Edo period Japan, located in Kōzuke Province (modern-day Gunma Prefecture), Japan.
Nanokaichi was ruled throughout its history by a junior branch of the Maeda clan of Kaga.
The location of the new holding in Kōzuke Province was selected partly to provide the Maeda clan a convenient stopping point in the sankin-kōtai procession to the shōgun's court in Edo.
During the rule of Maeda Toshiyoshi, the 11th daimyō of Nanokaichi, an extensive fiscal reform program was undertaken.
The domain's residence in Edo was located near Hanzōmon[1] Unlike most domains in the han system, which typically consisted of several discontinuous territories calculated to provide the assigned kokudaka, based on periodic cadastral surveys and projected agricultural yields.