From today's Japan Today:
Police on Monday arrested an 18-year-old girl on suspicion of breaking child prostitution and pornography laws after she was caught selling photos of herself naked.
The girl was quoted by police as saying that she was “looking for some spending money,” and based on her mobile phone records, had sold photos to around 150 people since November last year, earning some 1.1 million yen.
According to police, between December 2009 and April 2010, the girl posted on an Internet message board, advertising that she was selling photos of herself and underwear. She reportedly sent a total of 43 nude photos to a Kyoto man in his 40s and a Nagoya man in his 20s for 12,000 yen. Police discovered the girl by using the contact details she had posted on the message board.