Arata Osada (1887–1961) was a prominent educator known for his research on the educational reformer Pestalozzi. Born in Nagano Prefecture, Osada was in Hiroshima when the atomic bomb fell, an experience that moved him to become an ardent peace activist. In 1951 Iwanami Shoten published Genbaku no ko (translated as Children of the A-Bomb or Children of Hiroshima), his compilation of 105 personal accounts by young A-bomb survivors. He later served as the first president of the Japan Educational Research Association, and founded Save the Children Japan.