During the Edo period, the area of present-day Shimofusa was part of Takaoka Domain, a minor feudal domain of the Tokugawa shogunate. Modern Namekawa Village was established on April 1, 1889. On February 11, 1955, it merged with the villages of Takaoka and Komikado to form the town of Shimofusa.
In February 2006, the last data available before its merger into Narita, the town had an estimated population of 7,868 and a population density of 246 square kilometres (95sqmi). Its total area was 32.00 square kilometres (12.36sqmi).
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