On 9 July 2014, due to intensive rainfall of Typhoon Neoguri (T1408), slope failure and debris flow occurred at Nagiso town in Nagano prefecture. Especially at Nashizawa River, debris flow caused devastating damage on houses, railway tracks and Route 19. Tragically one person was killed and three injured. After the disaster, research team was immediately organized by Japan Society of Erosion Control Engineering with the aim of investigating the processes of generation, motion and deposition of debris flows, estimating extent and severity of damage from debris flow and evaluating the effect of, and damage on sabo-related facilities.
