Fuminobu Kimura, 37, who operates adult websites in Osaka, was arrested by Kyoto police after he crashed a server when thousands of emails to fake addresses were bounced back.
The spam messages were intended for mobile phones and sent in December 2003. A report by Japanese newswire Mainichi revealed that around 410,000 emails sent to unknown addresses were returned and felled the server. Kimura was arrested under the Japanese wired telecommunications law.
In other cybercrime news a Yemeni court convicted four men of stealing over $300,000 from a Canadian oil company. Nexen, the oil company, will be repaid the money by the four men who will remain under detention until all the fraudulently received money is returned.
The money was taken after one of the four men, a former Nexen employee, hacked into the company's network and removed money from its North American account. According to Reuters, two other men were acquitted.
Last week SC reported a New Zealander is being investigated by police after the teen hacked into the voicemail boxes of a number of prominent New Zealand statesmen and police.