Investigators reckon Yuki Shiina, 25, sent spam messages promoting gambling and dating sites. He allegedly purchased a list of 600,000 email addresses for a pricey 100,000 yens (927 dollars), earning 2 million yens (18,540 dollars) through a subsequent spamming campaign. Complaints from a local ISP over the volume of junk mail it was processing resulted in an investigation that led to his arrest.

Shiina's arrest is not the first made in Japan over alleged junk mail offences. Four men suspected of sending an internet-congesting 5.4 billion spam emails to promote a dating website were arrested in January 2007.

(Source: The Register)