The Neighborhood Association (隣組, Tonarigumi) was the smallest unit of the national mobilization program established by the Japanese government in World War II. It consisted of units consisting of 10-15 households organized for fire fighting, civil defense and internal security.[1]
The government also found the tonarigumi useful for the maintenance of public security. A network of informants was established linking every neighborhood association with the Tokkō Police to watch for infractions of national laws and suspect political or moral behavior.[3]
Later in the Pacific War the tonarigumi received basic military training to serve as observers for enemy planes over cities or suspicious boats along the coasts. In the final stages of war the Imperial government intended the tonarigumi to form a secondary militia in the case of enemy invasion. Some tonarigumi took part in combat in Manchukuo, northern Chōsen and Karafuto in the closing days of the Pacific War.
Formally abolished in 1947 by the American occupation authorities, the system survives to a certain extent in the modern chonaikai, or jichikai which are nominally independent voluntary associations, but which retain a quasi-governmental status in that they have limited responsibility for local administration and coordination of activities such as neighborhood watch and disaster relief.[6]