Is Toshiyuki Obora a threat to society? The Japanese state certainly seems to think so. The police arrested the 47-year-old elementary school worker and held him in detention for 75 days.

"I thought it would never end," says Obora.

After confiscating his computer and rifling through his personal belongings, the police called his workplace, from where he was forced to take 10 months leave and a 60 percent pay cut. Prosecutors demanded a six-month prison term.