Fuji River
The banks of the Fuji River was the location of the Battle of Fujikawa in 1180, one of the most important early battles of the Genpei War. The Sengoku period warlord Takeda Shingen built extensive dikes along the Kamanashi portion of the river, which allowed water to flood buffer zones to control damage. These dikes still exist, and are called the . Flood control efforts continued under the Tokugawa shogunate of the Edo period, when extensive dikes were completed in 1674 after 50 years of construction, to divert the lower river away from populated areas, which were prone to flooding.