International terrorist organizations run by Islamic extremists are expected to continue carrying out attacks worldwide, and the possibility of Japan becoming a target cannot be ruled out, the National Police Agency reckoned in an annual report on security released this week.

The agency's report for 2004 warns that Japan could be targeted, citing the repeated entries into Japan by French national Lionel Dumont, believed linked to al-Qaeda and other Islamic extremists.

Dumont lived in Japan for about a year and traveled abroad from Japan several times on a fake passport, according to a police investigation.