Original news report here: http://news.2chblog.jp/archives/51845809.html
[Quick translation] On April 16 and 23 of this year, the mothers of two students at a public elementary school in Sano City, Tochigi Prefecture, consecutively committed suicide. According to the bereaved families, the two children regularly had things hidden from them at school, were ignored, and were subject to bullying, and thus began skipping school. The two mothers asked the other mothers to "please stop" these acts, but at the urging of other mothers, the two were then ostracized from the other parents. Just before the suicides, they were relentlessly deemed "unqualified as mothers" by other mothers...In an investigation by the school and the Board of Education, it was "confirmed that malicious gossip was spread about the two mothers on LINE."