Japanese youngsters are getting so addicted to Internet-linking cell phones that the government is starting a program warning parents and schools to limit their use among children.

The government is worried about how elementary and junior high school students are getting sucked into cyberspace crimes, spending long hours exchanging mobile e-mail and suffering other negative effects of cell phone overuse, Masaharu Kuba, a government official overseeing the initiative, said Tuesday.

“Japanese parents are giving cell phones to their children without giving it enough thought,” he said. “In Japan, cell phones have become an expensive toy.”

The recommendations have been submitted from an education reform panel to Prime Minister Yasuo Fukuda’s administration, and were approved this week.

The panel is also asking Japanese makers to develop cell phones with only the talking function, and GPS, or global positioning system, a satellite-navigation feature that can help ensure a child’s safety.

Borders Group Inc. is returning to online retailing after seven years paired with Amazon.com, but analysts say it will be a challenge for the nation’s second-largest bookseller to compete with established Web retailers.

The move comes as Borders, which has said it may put itself up for sale, has lost market share both to online retailers and to discounters such as Wal-Mart Stores Inc. amid a difficult economic climate in the United States.

It’s a long shot, analysts say, in an environment where people are spending less and Amazon.com rules.

“Amazon just dominates,” said Fred Crawford, managing director at turnaround consultant AlixPartners who has studied consumer attitudes toward major booksellers. “Amazon is nearly unassailable.”

In 2001, Borders abandoned its money-losing online business, turning it over to Amazon. Under that arrangement, Borders.com took shoppers to a site partnered with Amazon, while a Web site for its stores allowed shoppers to check inventories and reserve items.

A masters student researching terrorist tactics who was arrested and detained for six days after his university informed police about al-Qaida-related material he downloaded has spoken of the “psychological torture” he endured in custody.

Despite his Nottingham University supervisors insisting the materials were directly relevant to his research, Rizwaan Sabir, 22, was held for nearly a week under the Terrorism Act, accused of downloading the materials for illegal use. The student had obtained a copy of the al-Qaida training manual from a US government website for his research into terrorist tactics.

The case highlights what lecturers are claiming is a direct assault on academic freedom led by the government which, in its attempt to establish a “prevent agenda” against terrorist activity, is putting pressure on academics to become police informers.

A $1 billion copyright infringement lawsuit challenging YouTube’s ability to keep copyrighted material off its popular video-sharing site threatens how hundreds of millions of people exchange all kinds of information on the Internet, YouTube owner Google Inc. said.

Google’s lawyers made the claim in papers filed in U.S. District Court in Manhattan as the company responded to Viacom Inc.’s latest lawsuit alleging that the Internet has led to “an explosion of copyright infringement” by YouTube and others.

The back-and-forth between the companies has intensified since Viacom brought its lawsuit last year, saying it was owed damages for the unauthorized viewing of its programming from MTV, Comedy Central and other networks, including such hits as “The Daily Show with Jon Stewart.”

In papers submitted to a judge late Friday, Google said YouTube “goes far beyond its legal obligations in assisting content owners to protect their works.”

It said that by seeking to make carriers and hosting providers liable for Internet communications, Viacom “threatens the way hundreds of millions of people legitimately exchange information, news, entertainment and political and artistic expression.”

Google said YouTube was faithful to the requirements of the 1998 Digital Millennium Copyright Act, saying the federal law was intended to protect companies like YouTube as long as they responded properly to content owners’ claims of infringement.