"What are you doing now?" One day, around 10 o'clock in the morning, Mariko (not her real name) received this e-mail message on her cellular phone. The 35-year-old Osaka housewife noticed that the e-mail was addressed to her 13-year-old son and had been sent to him by a friend at his middle school.
Mariko's son, who keeps telling her that he wants a cell phone of his own, frequently asks her to let him use the phone. So, his friend probably sent the message to Mariko's phone thinking that it belonged to Mariko's son.
Until she received the e-mail, Mariko had thought her son was at school.
"What's happened to him?" the shocked and anxious mother …