In the days of uncertainty immediately following the March 2011 Fukushima nuclear disaster, documentary filmmaker Masako Sakata turned to a book written by her late mother, an anti-nuclear campaigner, to try to make sense of what was happening.

The book, "Please Listen," is a collection of newsletters in which Shizuko Sakata continued to warn of the dangers of nuclear power as an ordinary person living in the quiet city of Suzaka, Nagano Prefecture.

The 3/11 disaster "prompted me to think back about what my mother had tried to tell her neighbors," Sakata said.