The rice riots of 1918 were a series of popular disturbances that swept across Japan from July to September 1918. Lasting for over eight weeks, the riots were the largest, most widespread, and most violent popular uprising in modern Japanese history, ultimately leading to the collapse of the Terauchi Masatake administration. The disturbances began in the small fishing town of Uozu in Toyama Prefecture and spread to nearly 500 locations, including 49 cities, 217 towns, and 231 villages, involving an estimated one to two million participants. The riots marked a new level of labor assertiveness and were described by a Home Ministry report at the time as a "crisis in relations between Labor and Capital".