Shingen's Embankment (信玄堤) is the surviving remnant of flood-control works ordered by Shingen along the Kamanashi River, completed around the 1560s. The system combined multiple structures including stone deflectors, weirs, and brush barriers to disperse floodwater with sophisticated engineering logic. It stands as proof that Shingen devoted as much genius to governing and feeding his people as he did to warfare, and it remained in use for centuries after his death.