Tokyo police have arrested a 38-year-old man suspected of storing a computer virus on his personal computer.
The arrest, which took place last week, falls under the country's new penal code which criminalizes the storage of malware for the purpose of infecting other computers. If convicted, the arrested man, 38-year-old Yasuhiro Kawaguchi, faces a maximum two years in jail or a fine of up to 300,000 yen.
This marks the first time that someone in Japan was charged under the new law, which took effect this month.
The police say that Kawaguchi uploaded a virus he created with a title suggesting that the file contained child pornography. They say that he admitted wanting to infect computers owned by users of file-sharing software. Although the virus did not damage the infected computers, it would cause glitches in the system, according to the police.