https://en.m.wikipedia.org/wiki/Akihabara_massacre
"The suspect apparently posted messages from his mobile phone to a website "Extreme Exchange, Revised",[35][36] revealing his intentions through his final message via his mobile phone 20 minutes before the attack.[37] A police official stated the first message read, "I will kill people in Akihabara." Other messages he is alleged to have posted include, "
If only I had a girlfriend, I wouldn't have quit work", "I would never have become addicted to my mobile phone. Anybody with hope couldn't possibly understand how I feel",[38] and "I don't have a single friend and I won't in the future.
I'll be ignored because I'm ugly. I'm lower than trash because at least the trash gets recycled."[28] It also referred to "a stabbing spree in Tsuchiura".[39]"
en.wikipedia.org
