Moto Sakura Castle was a Muromachi period "hirayama"-style castle located on the border of the town of Shisui and the city of Sakura, Chiba Prefecture, Japan. Its ruins been protected as a National Historic Site since 1998.

Shisui is a town located in Chiba Prefecture, Japan.As of 1 December 2020, the town had an estimated population of 20,660 in 9,888 households and a population density of 1,100 persons per km2. The total area of the town is 19.02 square kilometres (7.34 sq mi).